Mineral Specimens - page 2
Mexico - Canada

EV97AI8: Group of very well defined and bright Pyrargyrite crystals partially coated by white Quartz and small but very well defined Miargyrite crystals. The Miargyrite has been analyzed. An excellent miniature. We will send a copy of the analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 2.5 × 2 × 1.2 cm = 1.0” × 0.8” × 0.5”

Main crystal size: 1.7 × 0.3 cm = 0.7” × 0.1”

TK49AI5: Aggregate of crystals, on a little matrix, with a prismatic shape and flat terminations that are very bright, translucent and have reddish reflections. It is from a locality that is very new in the mineral world and that is producing very good silver sulphosalts. The sample has been analyzed and we’ll send a copy of the analysis to the buyer.
The specimen has been reviewed, photographed and published as a new discovery in the magazine ‘Mineral Up’ on page 37 of the 2018/02 edition.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 2.2 × 1.2 × 1.2 cm = 0.9” × 0.5” × 0.5”

TV37AH1: A novelty at Tucson 2018. Single translucent Pyrargyrite crystal with parallel growths, fine striations and intense reddish reflections. On matrix with small white Quartz crystals. The sample has been analyzed and we’ll send a copy of its analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 5.3 × 2.7 × 2.4 cm = 2.1” × 1.1” × 0.9”

Main crystal size: 1.4 × 0.8 cm = 0.6” × 0.3”

TA54AI7: A group of Miargyrite crystals with a good size for the species, with unusually well defined faces and edges, fine growth striations and very bright. An extraordinary miniature that has been analyzed. We’ll send a copy of the analysis to the buyer.
The sample has been referenced in the Mineral Up magazine (2018/2, pages 36-37).
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 2.2 × 2.1 × 1.5 cm = 0.9” × 0.8” × 0.6”

Main crystal size: 1 × 0.4 cm = 0.4” × 0.2”

TC89AH1: A novelty at Tucson 2018. Group of Miargyrite crystals with an extraordinary definition and length for the species. They are very bright and have fine growth striations. The sample has been analyzed and we’ll send a copy of its analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 2.5 × 2.1 × 1.2 cm = 1.0” × 0.8” × 0.5”

Main crystal size: 0.6 × 0.4 cm = 0.2” × 0.2”

TP50AH1: A novelty at Tucson 2018. Group of Miargyrite crystals, on matrix, with an extraordinary definition for the species. They are very bright and have fine growth striations. The sample has been analyzed and we’ll send a copy of its analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 2.6 × 2.5 × 1.4 cm = 1.0” × 1.0” × 0.6”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

TT30AH1: A novelty at Tucson 2018. Translucent Pyrargyrite crystal with intense reddish reflections and on a Quartz matrix with Miargyrite crystals that have an extraordinary definition for the species. They are very bright. The sample has been analyzed and we’ll send a copy of its analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 3.2 × 2 × 1.8 cm = 1.3” × 0.8” × 0.7”

Main crystal size: 0.3 × 0.2 cm = 0.1” × 0.1”

TA48AH1: A novelty at Tucson 2018. Very aerial growth of very sharp octahedral Acanthite crystals with epigenic Chalcopyrite and on matrix with Quartz. The sample has been analyzed and we’ll send a copy of its analysis to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (01/2018)

Specimen size: 4.4 × 2.5 × 2.9 cm = 1.7” × 1.0” × 1.1”

Main crystal size: 1.6 × 1.4 cm = 0.6” × 0.6”

TC11Z6: Group, on a Chalcopyrite matrix, of complex Tennantite crystals with a tetrahedral shape and very rich with faces, very bright and partially coated by small Quartz crystals. The analysis of the crystals indicates that they are basically silvery Tennantite, but the presence of other silver minerals such as Miargyrite, Pyrargyrite or Freibergite has been detected. The sample is from a Mexican zone that is scarcely known in mineralogical circles, so we indicate the locality as approximate because we don’t know if all the samples are from a single mine, different mines, or from a wider mining area. We will send a copy of the analysis of the Tennantite to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (2013)

Specimen size: 2.9 × 2.6 × 1.1 cm = 1.1” × 1.0” × 0.4”

Main crystal size: 0.3 × 0.3 cm = 0.1” × 0.1”

TD60Z6: Group, on a Chalcopyrite matrix, of complex Tennantite crystals with a tetrahedral shape and very rich with faces, very bright and partially coated by small Quartz crystals. The analysis of the crystals indicates that they are basically silvery Tennantite, but the presence of other silver minerals such as Miargyrite, Pyrargyrite or Freibergite has been detected. The sample is from a Mexican zone that is scarcely known in mineralogical circles, so we indicate the locality as approximate because we don’t know if all the samples are from a single mine, different mines, or from a wider mining area. We will send a copy of the analysis of the Tennantite to the buyer.
San José Mine, San José del Progreso, Municipìo San José del Progreso, Ocotlán District, Valles Centrales Region, Oaxaca  Mexico (2013)

Specimen size: 5.7 × 4.7 × 3.5 cm = 2.2” × 1.9” × 1.4”

Main crystal size: 0.4 × 0.3 cm = 0.2” × 0.1”

TP88AI8: Group of very well defined Azurite crystals with slightly curved faces and edges, bright with a very deep and vivid color and with small Malachite growths on the surfaces of the faces. Different from other Azurites at this locality.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico

Specimen size: 6.4 × 4.1 × 3.2 cm = 2.5” × 1.6” × 1.3”

TB69AF1: Flattened Azurite crystals that are very aerial on the matrix, with very well defined faces and edges and having the brilliant luster and famous rich blue color (“electric blue”) typical of the best samples from Milpillas. With small fibrous Malachite coatings.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 3.7 × 3.3 × 2.1 cm = 1.5” × 1.3” × 0.8”

Main crystal size: 2.3 × 1 cm = 0.9” × 0.4”

TC50X5: Group of crystals, one of them clearly dominant, with equant shape and polycrystalline growths on their faces. They are very well defined, are very bright and have the vivid blue color (electric blue) that has made the Azurites from this locality famous.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2011-2012)

Specimen size: 4 × 3 × 2.9 cm = 1.6” × 1.2” × 1.1”

TR67Z1: Aggregate of complex crystals with very well defined forms, and with polycrystalline surfaces. They are translucent and have the extraordinary deep blue color (“electric blue”) typical of the best samples from Milpillas. On matrix, with small crystals of Malachite pseudomorphous after Azurite.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2011-2012)

Specimen size: 4.1 × 3.9 × 2.7 cm = 1.6” × 1.5” × 1.1”

TN9AC9: Aggregate, on matrix, of lenticular Azurite crystals, with very well defined faces and edges and having the very intense luster from Milpillas and the famous rich blue color (“electric blue”) typical of the best samples from Milpillas. With small fibrous malachite coatings.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (12/2013)

Specimen size: 4.3 × 3.7 × 2.8 cm = 1.7” × 1.5” × 1.1”

Main crystal size: 2.8 × 1.6 cm = 1.1” × 0.6”

TV27AB4: Aggregate, on matrix, of complex Azurite crystals, two of them clearly dominant, with polycrystalline surfaces and very well defined faces and edges, a deep and vivid blue color (“electric blue”), transparent on the edges and a very intense luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (12/2013)

Specimen size: 4.4 × 2.7 × 1.8 cm = 1.7” × 1.1” × 0.7”

Main crystal size: 1.7 × 1.4 cm = 0.7” × 0.6”

TA99W9: Very aerial group of complex crystals that have very well defined faces and edges. They are translucent and have an extraordinary deep blue color (electric blue) typical of the best samples from Milpillas. They have vivid reflections and transparencies under a strong light.
Milpillas Mine, 1100 level, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (10/2011)

Specimen size: 4.4 × 2.8 × 2.2 cm = 1.7” × 1.1” × 0.9”

Main crystal size: 1.2 × 1 cm = 0.5” × 0.4”

TF36AD0: Polycrystalline growth of crystals, one of them clearly dominant, very rich in faces and on matrix. The crystals are very bright and show the extraordinary deep blue color (electric blue) that has made the Azurites from this locality famous.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (04/2015)

Specimen size: 4.5 × 3.2 × 1.8 cm = 1.8” × 1.3” × 0.7”

Main crystal size: 2.5 × 2.2 cm = 1.0” × 0.9”

TP48AB4: Aggregate, on matrix, of complex Azurite crystals, with very well defined faces and edges and polycrystalline surfaces. The crystals have a deep and vivid blue color (“electric blue”), transparent on the edges and a very intense luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (12/2013)

Specimen size: 4.9 × 3.5 × 2.5 cm = 1.9” × 1.4” × 1.0”

Main crystal size: 1 × 0.8 cm = 0.4” × 0.3”

TR71AE7: Very aerial aggregate, on matrix, of thick lenticular crystals with very well defined faces and edges, with slight curvatures and a very intense luster, with transparencies on the edges and the famous rich blue color (“electric blue”) typical of the best samples from Milpillas. The Azurite crystals are partially coated by balls of fibrous Malachite that has a silky luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (11-12/2013)

Specimen size: 5 × 2.9 × 2.5 cm = 2.0” × 1.1” × 1.0”

Main crystal size: 2.4 × 1.4 cm = 0.9” × 0.6”

TE21AC9: Aggregate, on matrix, of prismatic, flattened and doubly terminated Azurite crystals, with very well defined faces and edges and having the very intense luster and the famous rich blue color (“electric blue”) typical of the best samples from Milpillas. Coated by small fibrous Malachite.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2011-2012)

Specimen size: 5 × 4.2 × 2.5 cm = 2.0” × 1.7” × 1.0”

Main crystal size: 2.5 × 1.8 cm = 1.0” × 0.7”

TD50Q0: Aggregate of equidimensional crystals of Azurite of very deep color and intense luster, on matrix with Malachite. Some faces show a beginning of altering to Malachite but they haven’t lost their luster.

Milpillas Mine, 1100 level, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (08/2009)

Specimen size: 5.1 ×  3 × 2.8 cm = 2.0” × 1.2” × 1.1”

Main crystal size: 1.3 × 0.9 cm = 0.5” × 0.4”

TR98V4: Parallel aggregates of Azurite crystals with very well defined faces and edges, very bright and with a very deep color. They are on a base of fibrous crystals of Malachite.
Milpillas Mine, 1100 level, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (05/2010)

Specimen size: 5.3 × 4.4 × 2.7 cm = 2.1” × 1.7” × 1.1”

Main crystal size: 1.7 × 1.6 cm = 0.7” × 0.6”

TD47V2: Esthetic group of sharp, flattened, crystals of Azurite with very well defined faces and edges. They are partially pseudomorphed by Malachite, but they conserve a lot of the pristine transparency and intensity of color of the Azurite.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2009)

Specimen size: 5.4 × 3.2 × 1.4 cm = 2.1” × 1.3” × 0.6”

Main crystal size: 4 × 2.1 cm = 1.6” × 0.8”

TA10AE2: Aggregate of thick tabular crystals with very well defined faces and edges, small curvatures and a deep blue color (“electric blue”) typical of the best Milpillas samples, nearly transparent on the edges and an intense luster. The aggregate is partially coated by fibrous Malachite crystals with a silky luster. A sample of great character.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (09/2013)

Specimen size: 7.6 × 7.5 × 1.8 cm = 3.0” × 3.0” × 0.7”

Main crystal size: 2.2 × 1.1 cm = 0.9” × 0.4”

TG27AF8: Elongated, flattened and doubly terminated Azurite crystals, very rich in faces, extraordinarily bright with intense reflections and transparences under a bright light, and with the deep and vivid color (“electric blue”) typical of the best samples from Milpillas. The sample is of the best possible quality, both for the species and for the locality.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 9.2 × 6.6 × 4.1 cm = 3.6” × 2.6” × 1.6”

Main crystal size: 3.2 × 1.2 cm = 1.3” × 0.5”

TT27AI4: Aggregate of very sharp Azurite crystals, one of them clearly dominant. These crystals, between translucent and transparent, are very bright and have the extraordinarily deep and vivid blue color (“electric blue”) typical of the best samples from Milpillas and they are implanted on a rough Malachite band coating the matrix. The esthetic blue-green contrast between Azurite and Malachite is not too common at Milpillas.

Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (07-08/2014)

Specimen size: 9.9 × 6.7 × 4.2 cm = 3.9” × 2.6” × 1.7”

Main crystal size: 2.7 × 1.3 cm = 1.1” × 0.5”

TR96AH4: Very sharp flattened single translucent Azurite crystal with very well defined faces and edges, very bright with an extraordinary deep blue (electric blue) color typical of the best samples from Milpillas. The crystal is implanted on a rock matrix coated by acicular Brochantite crystals, rarely associated with Azurite.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2013)

Specimen size: 10.7 × 10.1 × 5.3 cm = 4.2” × 4.0” × 2.1”

Main crystal size: 2.3 × 1.2 cm = 0.9” × 0.5”

TR59AH6: Group of Malachite crystals pseudomorphous after Azurite, with very well defined faces and edges, some of them doubly terminated and with a velvety aspect on the surface of their faces.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2014)

Specimen size: 8.6 × 7 × 3.6 cm = 3.4” × 2.8” × 1.4”

Main crystal size: 2.5 × 2 cm = 1.0” × 0.8”

TD87AF0: A silky mass of flattened Malachite crystals, pseudomorphous after Azurite, with very well defined faces and edges. More elegant than usual.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico

Specimen size: 4.2 × 4 × 4.7 cm = 1.7” × 1.6” × 1.9”

Main crystal size: 4.2 × 3.5 cm = 1.7” × 1.4”

TA67X3: Aggregate of Malachite crystals, pseudomorphous after Azurite, which have very well defined faces and curvatures. They have a very deep color and an excellent luster for the species.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2009)

Specimen size: 5.6 × 4.3 × 3.3 cm = 2.2” × 1.7” × 1.3”

Main crystal size: 3.4 × 1.3 cm = 1.3” × 0.5”

TQ17V2: Aerial group of Malachite pseudomorphous after Azurite crystals, with rounded faces and edges, a very deep green color and silky luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2009)

Specimen size: 5.7 × 4.4 × 3.2 cm = 2.2” × 1.7” × 1.3”

Main crystal size: 2.2 × 0.9 cm = 0.9” × 0.4”

TB47AA2: Very aerial group of Malachite pseudomorphous after Azurite crystals, with slightly rounded faces and edges, a very deep green color and a silky luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico

Specimen size: 6.7 × 4.3 × 2.2 cm = 2.6” × 1.7” × 0.9”

Main crystal size: 3 × 1.4 cm = 1.2” × 0.6”

TF49Z0: Aggregate of thick and large crystals, some of them doubly terminated, of Malachite pseudomorphous after Azurite. At the bottom are fan-like aggregates of fibrous crystals with a clearer color.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2009)

Specimen size: 7.7 × 5.7 × 7.4 cm = 3.0” × 2.2” × 2.9”

Main crystal size: 4 × 1.8 cm = 1.6” × 0.7”

TN22AB2: A novelty at Tucson 2015. Flattened crystals pseudomorphous after Azurite, coated by fibrous aggregates of the same Malachite, and implanted on an unusual matrix: a very bright botryoidal Goethite.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (09-10/2014)

Specimen size: 9.3 × 7.5 × 7.7 cm = 3.7” × 3.0” × 3.0”

Main crystal size: 2.5 × 1.7 cm = 1.0” × 0.7”

TE22AE7: Aggregate of short prismatic Malachite crystals pseudomorphous after Azurite. They are very well defined, have a silky luster on their faces, are partially coated by colorless and very bright small Baryte crystals and are on a botryoidal Goethite matrix, which is very unusual for the locality.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (09-10/2014)

Specimen size: 11.7 × 9.2 × 4.8 cm = 4.6” × 3.6” × 1.9”

Main crystal size: 3.2 × 2 cm = 1.3” × 0.8”

TJ50AC8: Short prismatic Malachite pseudomorphs after Azurite crystals, some of them doubly terminated. They are on a Goethite matrix with small laminar, colorless, transparent and very bright Baryte crystals.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (09-10/2014)

Specimen size: 12 × 9.2 × 3.3 cm = 4.7” × 3.6” × 1.3”

Main crystal size: 2.8 × 1.5 cm = 1.1” × 0.6”

TA91AB3: A novelty at Tucson 2015. Aggregate, on a rocky matrix, of thick Malachite crystals pseudomorphous after Azurite. They have faces with a fibrous aspect and silky luster and are partially coated by laminar, colorless, clear and very bright Baryte crystals.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (09-10/2014)

Specimen size: 12.3 × 9.1 × 3.8 cm = 4.8” × 3.6” × 1.5”

Main crystal size: 2.8 × 2.5 cm = 1.1” × 1.0”

TR66AF1: Drusy bladed Malachite crystals, pseudomorphous after Azurite, forming rosettes which have very well defined faces and curvatures. They have a very deep color and a silky luster.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2017, page 106
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (± 2014)

Specimen size: 12.7 × 7.3 × 3 cm = 5.0” × 2.9” × 1.2”

Main crystal size: 3.1 × 3.1 cm = 1.2” × 1.2”

TR96AD6: A novelty at Tucson 2016. Polycrystalline aggregate of Cuprite crystals showing the dominant octahedron beveled by the dodecahedron, with very well defined faces and edges. The crystals, on a rocky matrix with massive Cuprite, are translucent and have a very deep red color that is partially masked by their extraordinary luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (12/2015-01/2016)

Specimen size: 2.1 × 1 × 1.1 cm = 0.8” × 0.4” × 0.4”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

TA49AH5: Polycrystalline surface of crystals with the dominant octahedron, but also with the faces of the dodecahedron and the cube. The crystals are translucent, very bright with a vivid red color and are on matrix. Of the best quality for that mine.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2012-2013)

Specimen size: 3.3 × 3.1 × 2.6 cm = 1.3” × 1.2” × 1.0”

Main crystal size: 1 × 0.4 cm = 0.4” × 0.2”

TK70AE9: Cuprite crystals formed by a dominant cube and octahedron, and beveled by the dodecahedron with some hoppered faces and, in general, with very well defined faces and edges. The crystals, on a rocky matrix, are translucent and have a very deep red color that is partially masked by their extraordinary luster.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 5 × 3.4 × 1.7 cm = 2.0” × 1.3” × 0.7”

Main crystal size: 0.8 × 0.8 cm = 0.3” × 0.3”

TR99AC9: A novelty at Tucson 2016. Very bright and sharp Cuprite crystals from recent finds at the Milpillas mine.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (12/2015-01/2016)

Specimen size: 5.6 × 5 × 2.5 cm = 2.2” × 2.0” × 1.0”

Main crystal size: 0.9 × 0.6 cm = 0.4” × 0.2”

TC16AH5: Polycrystalline surface of crystals with the dominant octahedron, but also with the faces of the dodecahedron and the cube. The crystals are translucent, very bright with a vivid red color and are on matrix. Of the best quality for that mine.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2012-2013)

Specimen size: 6.4 × 3.7 × 2.3 cm = 2.5” × 1.5” × 0.9”

Main crystal size: 1 × 0.7 cm = 0.4” × 0.3”

TB16AH5: Polycrystalline surface of crystals with the dominant octahedron, but also with the faces of the dodecahedron and the cube. The crystals are translucent, very bright with a vivid red color and are on matrix, with white fibrous Dickite aggregates. Of the best quality for that mine.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2012-2013)

Specimen size: 7 × 4.8 × 1.8 cm = 2.8” × 1.9” × 0.7”

Main crystal size: 0.8 × 0.6 cm = 0.3” × 0.2”

TD66AH5: Polycrystalline surface of crystals with the dominant octahedron, but also with the faces of the dodecahedron and the cube. The crystals are translucent, very bright with a vivid red color and are on matrix. Of the best quality for that mine.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2012-2013)

Specimen size: 7.1 × 6.2 × 2.8 cm = 2.8” × 2.4” × 1.1”

Main crystal size: 2.4 × 1.2 cm = 0.9” × 0.5”

TH88AE9: Aggregate of elongated idiomorphic crystals with very well defined faces and edges and sharp chisel-like terminations. Their definition, crystal size, as well as their color and luster and, in general, very high quality, make them the world's best for this species.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 3.6 × 2.5 × 1 cm = 1.4” × 1.0” × 0.4”

Main crystal size: 1.2 × 0.5 cm = 0.5” × 0.2”

TL79AB4: A novelty at Tucson 2015. Fibrous Brochantite is very well known at the Milpillas mine but this sample has aggregates of elongated idiomorphic crystals, one of them clearly isolated and doubly terminated, with very well defined faces and edges and chisel like terminations. In our opinion, the world's best for the species for their definition, crystal size, as well as their color and luster and, in general, very high quality.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (07-08/2014)

Specimen size: 9.5 × 6.3 × 3.3 cm = 3.7” × 2.5” × 1.3”

Main crystal size: 1 × 0.4 cm = 0.4” × 0.2”

TV68AE9: Rosette aggregate, on matrix, of flattened and very well defined crystals that are bright with a deep green color. The Milpillas Volborthite samples are probably the world's best for their quality, luster, and crystal size, and they are considered a new standard for this species. An excellent thumbnail.
This specimen has been reviewed and published in the special "Milpillas" of the magazine ‘Lapis’ number 07-08/2017, page 38
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 1 × 0.9 × 0.8 cm = 0.4” × 0.4” × 0.3”

Main crystal size: 0.9 × 0.6 cm = 0.4” × 0.2”

EV67AC1: Volborthite was the new sensation in the Tucson Show 2015 as well as in Ste. Marie, but the number of them seems to be somewhat limited.
The Milpillas ones are without doubt the world's best for their luster, shape, good contrast with the white clay matrix and the crystal size of the best ones, so all together these are a new standard for this species. We are proud to offer this one which has a very reasonable balance quality / price.
Milpillas Mine, level 26, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (04/2015)

Specimen size: 1.3 × 1 × 0.9 cm = 0.5” × 0.4” × 0.4”

TX66AE8: Very aerial aggregate of unusually sharp, isolated and complete Volborthite crystals. They have very well defined forms, are bright, have a deep green color and are on matrix, with fibrous Brochantite aggregates.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 3.1 × 1.9 × 1.5 cm = 1.2” × 0.7” × 0.6”

Main crystal size: 1.8 × 0.9 cm = 0.7” × 0.4”

TY36AD0: A novelty at Tucson 2016. Aggregate of fibrous crystals, very well defined for this unusual vanadate, with a yellowish-green color and on matrix. A new rarity from Milpillas. The sample has been analyzed and we’ll send a copy of this analysis to the buyer.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 0.9 × 0.8 × 0.7 cm = 0.4” × 0.3” × 0.3”

TQ46AD0: A novelty at Tucson 2016. Aggregate of fibrous crystals, very well defined for this unusual vanadate, with a yellowish-green color and on matrix. A new rarity from Milpillas. The sample has been analyzed and we’ll send a copy of this analysis to the buyer.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (2015)

Specimen size: 1.1 × 1 × 0.9 cm = 0.4” × 0.4” × 0.4”

TM47AD1: A novelty at Tucson 2016. Very sharp platy crystals, transparent, very bright and with a reddish color probably due to Hematite inclusions. They are on a Goethite matrix and are very unusual for the locality.
Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora  Mexico (06/2015)

Specimen size: 12 × 7.2 × 1.7 cm = 4.7” × 2.8” × 0.7”

Main crystal size: 0.9 × 0.4 cm = 0.4” × 0.2”

TF49AI8: Group of very bright Pyrargyrite crystals with very well defined faces and edges, with an associated group of very sharp small Polybasite crystals and on a matrix of Quartz crystals.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 8.5 × 7.4 × 3.4 cm = 3.3” × 2.9” × 1.3”