Reference Specimens
Mexico

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Photos by Fabre Minerals. Under Creative Commons license

This page provides a selection of the specimens that have passed through the Fabre Minerals website and, due to their quality,
rarity, or significance as specimens from interesting locations, have been preserved as reference specimens in #MVM


ZACATECAS / Fresnillo

Acanthite
Acanthite. Front
Front
Acanthite.
Acanthite. Side
Side
 

TMA97AN5: Aerial group of cubo-octahedral Acanthite crystals, very shiny and sharp for the species, and with distinct hopper growths on some of the faces.
We will send the specimen, from a very classic Mexican locality for Acanthite, in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 2.4 × 1.3 × 1.1 cm = 0.94” × 0.51” × 0.43”

Former collection of Bob Noble
Pyrargyrite
 

TAM37AO3: Group of Pyrargyrite crystals with elongated and very sharp prismatic crystal forms and excellent terminations, lustrous and aerial.
We will send the specimen to the buyer in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 1.8 × 1.4 × 1.3 cm = 0.71” × 0.55” × 0.51”

Former collection of Bob Noble
Pyrargyrite. Pyrargyrite.
Pyrargyrite with Quartz
Pyrargyrite with Quartz.
 

MT13AE2: Aggregate of prismatic crystals with a very well defined hexagonal shapes, excellent terminations, very neat and bright, and partially coated by small Quartz crystals. A little Mexican jewel.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 2.3 × 2 × 1.4 cm = 0.91” × 0.79” × 0.55”

Main crystal size: 0.6 × 0.3 cm = 0.24” × 0.12”

Pyrargyrite
 

TE87AM0: Group of sharp doubly terminated Pyrargyrite crystals with prismatic habit. Clearly hexagonal in outline, with good terminations, very lustrous and on matrix.
We will ship the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 2.4 × 2.3 × 2 cm = 0.94” × 0.91” × 0.79”

Main crystal size: 2.2 × 1.6 cm = 0.87” × 0.63”

Former collection of Bob Noble
Pyrargyrite. Front  / Photo: Joaquim Callén
Front / Photo: Joaquim Callén
Pyrargyrite. Side  / Photo: Joaquim Callén
Side / Photo: Joaquim Callén
Pyrargyrite with Calcite
Pyrargyrite with Calcite. Front
Front
Pyrargyrite with Calcite. Close-up
Close-up
Pyrargyrite with Calcite. Top
Top
Pyrargyrite with Calcite. Rear
Rear

Fluorescent light (daylight)
 

TT14AJ3: Aerial Pyrargyrite crystal with very well defined faces and edges and excellent terminal forms. It is translucent with vivid red reflections and implanted on a matrix of scalenohedral Calcite crystals.
The specimen has been reviewed, photographed and published as a new discovery in the magazine ‘Mineral Up’ on page 43 of the 2019/02 edition.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico (2018)

Specimen size: 2.8 × 1.7 × 2.2 cm = 1.10” × 0.67” × 0.87”

Main crystal size: 0.7 × 0.6 cm = 0.28” × 0.24”

Pyrargyrite with Calcite and Quartz
 

MY99AC8: Rounded aggregates of short prismatic Pyrargyrite crystals with very well defined faces and edges and some of them are doubly terminated. They are reddish and are on a matrix with spheroidal aggregates of small scalenohedral Calcite and Quartz crystals. A Mexican classic.
Proaño Mine, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 5.7 × 5.3 × 5.1 cm = 2.24” × 2.09” × 2.01”

Main crystal size: 1.2 × 0.4 cm = 0.47” × 0.16”

Pyrargyrite with Calcite and Quartz. Pyrargyrite with Calcite and Quartz.
Pyrargyrite with Polybasite
Pyrargyrite with Polybasite. Pyrargyrite with Polybasite.
Pyrargyrite with Polybasite.
 

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 = 3.35” × 2.91” × 1.34”

Stephanite with Pyrite
 

TA99E0: An excellent, really shiny Stephanite that is well positioned on the matrix and has complex crystal forms. There are also some large crystals of Stephanite on the rear of the specimen. There are no dings or scratches anywhere on it and there is a small amount of Pyrite matrix. As we often do, we will send the buyer of this one a copy of the analysis of this tempting specimen.
San Luis shaft, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 3 × 1.6 × 1.3 cm = 1.18” × 0.63” × 0.51”

Main crystal size: 1.1 × 0.6 cm = 0.43” × 0.24”

Stephanite with Pyrite. Stephanite with Pyrite.
Stephanite with Quartz
Stephanite with Quartz. Front
Front
Stephanite with Quartz. Side
Side
Stephanite with Quartz.
Stephanite with Quartz  

NM91AM9: Very individualized Stephanite crystals, relatively complex and with very well defined faces and edges. Lustrous, and on a matrix with translucent white Quartz crystals that give a nice contrast to the piece. An excellent and rare Mexican classic that comes from the Ignacio Gaspar Sintes collection (number PIR-11), the label of which we will send to the buyer, as well as a copy of the analysis carried out. This specimen previously resided at the Arizona Desert Museum, and in Gregory, Bottley & Lloyd, and in two other private, unidentified collections.
Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico

Specimen size: 9 × 7 × 3 cm = 3.54” × 2.76” × 1.18”

Main crystal size: 0.4 × 0.4 cm = 0.16” × 0.16”

Former collection of Ignacio Gaspar

ZACATECAS / Fluorescent Opal (variety hyalite)

If you want to know more about these Opals please follow this link

Opal (variety hyalite)
 

TP27Z1: A novelty at Tucson 2014. These Opals (variety hyalite) appeared for first time during the Tucson Show and in addition to the fact that they are gemmy and quite aesthetic, standing up on their matrix, their main feature is that they fluoresce even in daylight! In fact, they fluoresce in almost all kinds of light, neon light, LED light, daylight and, of course,UV light. The only light with which they don't react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
This specimen was photographed and published as a novelty at the 2014 Tucson Show in the magazine "Lapis" number 03/2014, page 32, and in the Russian magazine ‘Mineral Observer’ on page 62 in the volume 19, number 3
Zacatecas  Mexico (2013-2014)

Specimen size: 1.8 × 1.8 × 1.3 cm = 0.71” × 0.71” × 0.51”

First generation Fluorite fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite)
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
 

TL63Z2: A novelty at Tucson 2014. These Opals (variety hyalite) appeared for first time during the Tucson Show and in addition to the fact that they are gemmy and quite aesthetic, standing up on their matrix, their main feature is that they fluoresce even in daylight! In fact, they fluoresce in almost all kinds of light, neon light, LED light, daylight and, of course,UV light. The only light with which they don't react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
This specimen was published on the Mineralogical Record´s web page, in the ‘What’s New in the Mineral World?’ section, report #37, April 14, 2014 edition.

Zacatecas  Mexico (2013-2014)

Specimen size: 2.2 × 1.6 × 1.1 cm = 0.87” × 0.63” × 0.43”

Extremely fluorescent long & short UV
Opal (variety hyalite)
 

TM14Z6: A novelty at Tucson 2014. Transparent botryoidal growth on matrix. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic, standing up on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light, neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 2.2 × 1.5 × 1 cm = 0.87” × 0.59” × 0.39”

Extremely fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite)
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
 

TX26Z6: A novelty at Tucson 2014. Transparent botryoidal growth on matrix. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic, standing up on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light, neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 2.7 × 1.8 × 0.9 cm = 1.06” × 0.71” × 0.35”

Extremely fluorescent long & short UV
Opal (variety hyalite)
 

TJ14Z2: A novelty at Tucson 2014. These Opals (variety hyalite) appeared for first time during the Tucson Show and in addition to the fact that they are gemmy and quite aesthetic, standing up on their matrix, their main feature is that they fluoresce even in daylight! In fact, they fluoresce in almost all kinds of light, neon light, LED light, daylight and, of course, UV light. The only light with which they don't react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 3.5 × 2.6 × 1.6 cm = 1.38” × 1.02” × 0.63”

Extremely fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite)
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
 

TV67AA2: A novelty at Tucson 2014. Transparent botryoidal growths on matrix. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic standing up on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light, neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As these are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 4.7 × 3.7 × 2.2 cm = 1.85” × 1.46” × 0.87”

Extremely fluorescent long & short UV
Opal (variety hyalite)
 

TT16Z6: A novelty at Tucson 2014. Transparent botryoidal growth on matrix. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic, standing up on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light, neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 4.8 × 2.5 × 3.7 cm = 1.89” × 0.98” × 1.46”

Extremely fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite)
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
 

TC16AA2: A novelty at Tucson 2014. Transparent botryoidal growths on matrix. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic standing up on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light, neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As these are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 6 × 4.1 × 3.3 cm = 2.36” × 1.61” × 1.30”

Extremely fluorescent long & short UV
Opal (variety hyalite)
 

TB47Z2: A novelty at Tucson 2014. These Opals (variety hyalite) appeared for first time during the Tucson Show and in addition to the fact that they are gemmy and quite aesthetic, standing up on their matrix, their main feature is that they fluoresce even in daylight! In fact, they fluoresce in almost all kinds of light, neon light, LED light, daylight and, of course,UV light. The only light with which they don't react is incandescent. As they are so new the locality is still very vague, sorry for that, but we are sure that time will clarify the locality as well as the reason why they fluoresce so strongly.
Zacatecas  Mexico (2013-2014)

Specimen size: 7.4 × 5.9 × 3.4 cm = 2.91” × 2.32” × 1.34”

Extremely fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite)
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite).
 

TE26AA5: A novelty at Tucson 2014. Transparent botryoidal growths on matrix, with small sprays of whitish, elongated and tubular forms. This kind of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic and stands up well on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light: neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As the find is so new the locality is still very vague; sorry for that, but we are sure that time will clarify the locality as well as the reason why the specimens fluoresce so strongly. On this sample the peculiar tubular growths above cited, which you can see on the close-up image, caught our attention. We had them analyzed, and they proved to be an unspecified form of silica. We will send a copy of the analysis to the buyer.
Zacatecas  Mexico (2013-2014)

Specimen size: 8.2 × 5.1 × 4.5 cm = 3.23” × 2.01” × 1.77”

Intense fluorescence long & short UV
Opal (variety hyalite)
 

TF66AC6: Very transparent and bright botryoidal growth on matrix. One of the best samples of this find. This type of Opal (variety hyalite), in addition to the fact that it is gemmy and quite aesthetic and stands up well on its matrix, has the extraordinary property of fluorescing in daylight! In fact, it fluoresces in almost all types of light: neon light, LED light, daylight and, of course, UV light. The only light with which it doesn’t react is incandescent. As the find is so new the locality is still very vague; sorry for that, but we are sure that time will clarify the locality as well.
Zacatecas  Mexico (2013-2014)

Specimen size: 9.5 × 9.3 × 4 cm = 3.74” × 3.66” × 1.57”

Very fluorescent long & short UV
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light
Opal (variety hyalite). LED light
LED light
Opal (variety hyalite). Day light
Day light

ZACATECAS / other localities

Tennantite
Tennantite.
 

FX26: Good and sharp Tennantite crystal faces, good disposition on the white Quartz matrix. As frequent in Oliete's specimens: a good esthetic choice. Minor Pyrite is also present.
El Cobre Mine, Concepción del Oro, Municipio Concepción del Oro, Zacatecas  Mexico

Specimen size: 7 × 5 × 6.7 cm = 2.76” × 1.97” × 2.64”

Main crystal size: 1.4 × 0.9 cm = 0.55” × 0.35”

Former Oliete collection. Number 241, bought in 1971
Malachite with Quartz (variety chalcedony)
 

TR88AL5: Growth of Malachite microcrystals of lenticular habit, with two very different intensities of green, on matrix with groups of small Quartz crystals and botryoidal Quartz (chalcedony variety). High quality for the deposit.
Concepción del Oro, Municipio Concepción del Oro, Zacatecas  Mexico

Specimen size: 6 × 5.1 × 5 cm = 2.36” × 2.01” × 1.97”

Main crystal size: 2.6 × 2.4 cm = 1.02” × 0.94”

Malachite with Quartz (variety chalcedony). Malachite with Quartz (variety chalcedony).
Prosopite with Azurite
Prosopite with Azurite. Prosopite with Azurite.
 

MC66AM7: Floater botryoidal growth of Prosopite, a rare calcium and aluminum fluoride of turquoise-blue color, with vivid blue deformed Azurite crystals.
We will ship the specimen in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Mazapil, Municipio Mazapil, Zacatecas  Mexico

Specimen size: 3.3 × 2.3 × 2.5 cm = 1.30” × 0.91” × 0.98”

Former collection of Bob Noble
Arsenopyrite with Boulangerite
 

TG14AN2: Very sharp and equant crystals of Arsenopyrite, very lustrous, with coatings of felted groups of acicular Boulangerite crystals.
We will ship the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label, which shows that it was previously in the Melanson collection.
Noche Buena Mine, Noche Buena, Municipio Mazapil, Zacatecas  Mexico

Specimen size: 3.1 × 2.3 × 1.9 cm = 1.22” × 0.91” × 0.75”

Main crystal size: 0.8 × 0.5 cm = 0.31” × 0.20”

Former collection of Bob Noble
Arsenopyrite with Boulangerite. Arsenopyrite with Boulangerite.
Arsenopyrite with Boulangerite.
Fluorite with Calcite and Chalcopyrite
Fluorite with Calcite and Chalcopyrite.
Fluorite with Calcite and Chalcopyrite.
 

TR11G8: Crystals combine faces of cube and octahedron. Lilac color and transparency are very good. On the matrix there are some Tetrahedrite crystals and small formations of Calcite and Chalcopyrite.
San Martín Mine, San Martín, San Martín-Sabinas District, Municipio Sombrerete, Zacatecas  Mexico (01/2005)

Specimen size: 7.4 × 5 × 4.8 cm = 2.91” × 1.97” × 1.89”

Main crystal size: 1.3 × 0.9 cm = 0.51” × 0.35”



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