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NF11X9: Stannite with Chalcopyrite and Arsenopyrite
Stannite and Chalcopyrite intergrowths. The Stannite is slightly golden dark gray and the Chalcopyrite shows a brass color. The complexity of these growths, the poor definition of crystalline forms and the fact that Stannite also frequently substitutes for Sphalerite, resulted in Stannite having been almost unnoticed at Panasqueira. We’ll send a copy of the analysis to the buyer.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2004)
Specimen size: 5 × 2.1 × 3.3 cm = 1.97” × 0.83” × 1.30”
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AB68AD6: Stannite with Chalcopyrite, Pyrite, Marcasite, Siderite and Calcite
Epigenic growth of very small Stannite crystals on a single Chalcopyrite crystal, with Siderite crystals, Calcite coatings and small Marcasite and Pyrite crystals partially coating the Stannite. We’ll send a copy of the analysis of the Stannite to the buyer of this sample.
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (1987-2013)
Specimen size: 8.5 × 5.7 × 2.9 cm = 3.35” × 2.24” × 1.14”
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TAZ76AO3: Stannite with Muscovite and Arsenopyrite
Group on matrix of lustrous dark grey Stannite crystals whose faces and edges show very pronounced curvatures. The Stannite contrasts with the lamellar crystals of Muscovite and the crystals of Arsenopyrite, which are very sharp and have a lighter metallic tone. We will send the buyer the specimen in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China
Specimen size: 2.3 × 2 × 2.1 cm = 0.91” × 0.79” × 0.83”
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NQ60F4: Stannite with Sphalerite and Arsenopyrite
A curious and unusual form. The crystals of Sphalerite have such curved edges and faces that they appear to be almost spherical. The Stannite is a fine coating, which makes the Sphalerite appear satin. At the base there are some prismatic, well-developed crystals of Arsenopyrite that make this one seem aerial and esthetic.
Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2004)
Specimen size: 4.2 × 3.2 × 2.7 cm = 1.65” × 1.26” × 1.06”
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9AF27Q0: Stannite, Arsenopyrite, Quartz
Botryoidal growths of Stannite crystals whose faces and edges have very pronounced curvatures, of deep grey color, with very well defined crystals of Arsenopyrite and Quartz. The piece has a slight fissure but the matrix is stable. The Stannite, which in this locality is easily confused with Sphalerite, has been properly analyzed and we’ll send a copy of the analysis to the buyer. A mine that has produced excellent world-class examples of Fluorite and interesting sulphides.
Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province  China (2004)
Specimen size: 6.2 × 5.4 × 3.9 cm = 2.44”
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10EE58: Staurolite
Staurolite crystals showing the typical cross-shaped twin with well defined faces and edges, doubly terminated, with a deep brown color highlighting the contrast with the whitish mica-schist matrix. Specimens of Staurolite from this locality in most cases exhibit cross-shaped twins at 90 or 120 degrees, as is the case here, there being few specimens of non-twinned crystals.
Semiostrov'e, Keivy Mountains, Kola Peninsula, Murmanskaja Oblast, Northern Region  Russia
Specimen size: 3.9 × 3.0 × 1.4 cm = 1.54” × 1.18” × 0.55”
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10ED58: Staurolite
Staurolite crystals showing the typical cross-shaped twin with well defined faces and edges, doubly terminated, with a deep brown color highlighting the contrast with the whitish mica-schist matrix. Specimens of Staurolite from this locality in most cases exhibit cross-shaped twins at 90 or 120 degrees, as is the case here, there being few specimens of non-twinned crystals.
Semiostrov'e, Keivy Mountains, Kola Peninsula, Murmanskaja Oblast, Northern Region  Russia
Specimen size: 3.9 × 3.0 × 1.4 cm = 1.54” × 1.18” × 0.55”
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22TTX12: Staurolite
Single crystal of Staurolite from a classic Russian locality for this mineral species, with sharp crystal forms and with a well marked mold left by a now disappeared crystal of the same species but which perfectly displays the iron cross twinning. The specimen comes from the old collection of Robert-Auguste Touchon.
Keivy Mountains, Kola Peninsula, Murmanskaja Oblast, Northern Region  Russia
Specimen size: 3.3 × 2.2 × 1.5 cm = 1.30” × 0.87” × 0.59”
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21CXX11: Staurolite
Elongated, doubly terminated prismatic Staurolite crystal with well-defined faces and edges of deep dark colors and with some Muscovite on the crystal terminations. This floater specimen, of high quality for the deposit, a Spanish classic. It comes from the Carles Curto collection of duplicates (number 1971.12), whose label and computer file we will send to the buyer.
Montejo de la Sierra, Comarca Sierra Norte, Community of Madrid  Spain
Specimen size: 5.0 × 1.7 × 1.2 cm = 1.97” × 0.67” × 0.47”
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MX53AE6: Staurolite with Almandine
Very elongated Staurolite crystals with dodecahedral Almandine crystals all on a leafy Muscovite matrix. The crystals are untwined, which is very unusual, and are very bright with a very deep brown color. Among the best from the locality.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2017, page 82, in the magazine ‘Rocks & Minerals’ on page 347 in the volume 93, number 4, Jul/Aug 2018, and in the book "Minéraux - Le Guide des Passionnés" (page 401)
Keivy Mountains, Kola Peninsula, Murmanskaja Oblast, Northern Region  Russia (±2000)
Specimen size: 17.8 × 12.2 × 3.2 cm = 7.01” × 4.80” × 1.26”

Main crystal size: 5 × 1.4 cm = 1.97” × 0.55”
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ED76Y8: Steenstrupine
Group of black crystals with a dipyramidal shape and rhombic aspect (they are trigonal). They have very well developed faces and edges and are a good size for this rare cyclosilicate. The sample, on matrix and with fibrous Aegirine aggregates on the back, is with a Claus Hedegaard collection label that we’ll send to the buyer.
Tasseq Skråningen, Ilimaussaq Massif, Narsaq (Narssaq), Kujalleq, Greenland  Denmark
Specimen size: 4.5 × 4 × 2 cm = 1.77” × 1.57” × 0.79”
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EC67Y8: Steenstrupine
Isolated black crystal with dipyramidal shape and rhombic aspect (it is trigonal). It has very well developed faces and edges and a good size for this rare cyclosilicate. The sample is with a Claus Hedegaard collection label that we’ll send to the buyer.
Tasseq Skråningen, Ilimaussaq Massif, Narsaq (Narssaq), Kujalleq, Greenland  Denmark
Specimen size: 3 × 2.8 × 1.9 cm = 1.18” × 1.10” × 0.75”
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MV13AM8: Stellerite
Floater aggregate with a sheaf-like habit of Stellerite crystals with sharp crystal forms, translucent, white in color and with a pearly luster.
We will send the buyer the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label.
Aurangabad, Aurangabad District, Maharashtra  India
Specimen size: 3 × 2.2 × 1.9 cm = 1.18” × 0.87” × 0.75”
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TC13AN2: Stellerite
Spheroidal growth of Stellerite on matrix, translucent, lustrous and opaline white. We will ship the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label.
Aurangabad, Aurangabad District, Maharashtra  India
Specimen size: 2.8 × 2.8 × 2.2 cm = 1.10” × 1.10” × 0.87”
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AZ16M4: Stellerite with Calcite
From a classic locality for the species. Very sharp Stellerite crystals, showing bow-tie growths with an excellent and attractive color. On a Quartz rich matrix.
Sokolovskoe Mine (Sokolovskiy Mine), Rudny, Kostanay Region  Kazakhstan
Specimen size: 12 × 11.5 × 5.7 cm = 4.72” × 4.53” × 2.24”
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AG86N2: Stellerite with Chabazite-Ca
Globular growths of deep orange color. They are on a matrix with small crystals of Chabazite-Ca. Relatively abundant in the past, it is now hard to obtain.
Sarbaiskoe deposit, Rudny, Kostanay Region  Kazakhstan (1997)
Specimen size: 8.2 × 4.8 × 2.4 cm = 3.23” × 1.89” × 0.94”
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MC48AJ3: Stephanite
Group of crystals with a tabular shape and a very sharp hexagonal contour. They are very bright and are on matrix. A fine sample, a German classic. The sample has been analyzed and we will send a copy of the analysis to the buyer.
Freiberg District, Erzgebirgskreis, Saxony/Sachsen  Germany
Specimen size: 5.6 × 4 × 2.1 cm = 2.20” × 1.57” × 0.83”
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M88RC3: Stephanite
A mineral that bears the name of a King (Stephan) and mined over two centuries ago, in the 19th century. So much history for this rare specimen.
Ruda Barza, Brad, Transilvania  Romania
Specimen size: 5.5 × 4 × 2.8 cm = 2.17” × 1.57” × 1.10”
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FT87: Stephanite with Calcite
A great Stephanite. The crystal size is not that large, but put it all together, the brilliance and the nice position on the top of white Calcite crusts, and it could satisfy a demanding collector.
Mina Grande, Fresnillo de González Echeverría (Fresnillo), Municipio Fresnillo, Zacatecas  Mexico
Specimen size: 6 × 3.2 × 2.7 cm = 2.36” × 1.26” × 1.06”
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RH37F8: Stephanite with Miargyrite
From the Spanish locality that is a classic for its excellent silver sulfosalts. A small, long crystal with perfect definition of the faces and accompanied by Miargyrite, both on the matrix typical for the locality. Folch found this at the Teresa Mine in 1950.
Hiendelaencina, Comarca Serranía de Guadalajara, Guadalajara, Castilla-La Mancha  Spain (05/1950)
Specimen size: 2.9 × 1.4 × 1.3 cm = 1.14” × 0.55” × 0.51”

Main crystal size: 0.2 × 0.1 cm = 0.08” × 0.04”
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TCR87AO4: Stephanite with Polybasite and Selenopolybasite
Very aerial group of Stephanite crystals with hexagonal outlines, very sharp crystal forms and intense luster. They comprise the base for small Polybasite and Selenopolybasite crystals, most likely due to two successive formation phases. This specimen has been individually analyzed and 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: 2.8 × 2.4 × 1.9 cm = 1.10” × 0.94” × 0.75”
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TA99E0: Stephanite with Pyrite
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”
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NM91AM9: Stephanite with Quartz
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”
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MQ16AM7: Stibarsen
Botryoidal Stibarsen growth with gray microcrystalline surfaces and a little matrix.
We will ship the specimen in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Sarabau Mine, Bau, Kuching, Kuching District, Kuching Division, Sarawak State, Borneo Island  Malaysia
Specimen size: 3.3 × 2.7 × 1.9 cm = 1.30” × 1.06” × 0.75”
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TFR1AO8: Stibiconite
Very aerial Stibiconite pseudomorph after a Stibnite crystal, with perfectly defined crystal forms and excellent terminations. On matrix, covered by pale pink scalenohedra of Calcite.
Real de Catorce (Catorce), Catorce Mountains, Municipio Catorce, San Luis Potosí  Mexico
Specimen size: 15 × 9.1 × 5 cm = 5.91” × 3.58” × 1.97”

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