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Mineral Specimens with Siderite
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12.3 x 5.7 x 5.0 cm. This is a most unusual specimen, as I have seen very few examples from this small quarry in Iowa. It is a cabinet plate with lustrous, waxy, sharp crystals of siderite. They have a nice chocolate-brown color to them. This is overall a big and impressive piece, and a very interesting locality example of this species. Minor scalenohedral white calcite is in association. Ex. Harold Urish Collection.
5.6 x 2.8 x 2.4 cm. An unusually shaped and very showy pyrrhotite specimen from the famous mines at Santa Eulalia. The steep, mountain peak-like cluster actually extends upward from a single, pseudohexagonal pyrrhotite crystal. The complete-all-around piece has classic, bronzey-brown lustre and has the very interesting accent of scattered balls of bladed siderite. This piece is a doubly terminated floater, as there are also tiny siderite balls on the bottom of the piece. Old-time material from the 1960s or 1970s. Ex. Consie Prince Collection.
5.2 x 2.7 x 1.3 cm. The Siete Suyos mine (Seven Servants mine) is sometimes considered to be part of the Animas mine, and it is often difficult to know where specimens are from because several mines in the area share the same vein system. The good news is that I directly obtained this specimen from the miner who collected it, so I know for certain where it came from. I honestly have never seen any specimens from this locality before. This piece features a few excellent quality, sharp, gemmy, greenish-brown rhombic crystals of Siderite measuring up to 0.8 cm which are sitting upon a crystal of lustrous Pyrite (pseudomorph after a compressed rhombohedron of Siderite) which are associated with minor grey crystals of the rare sulfide, Stannite. The underside of the specimen reveals that the Pyrite is somewhat hollow inside, and actually hosts a second generation of Siderite crystals. For Siderite, the quality is impressive for Bolivia, as I rarely have seen such sharp and gemmy crystals from any Bolivian locality.
11.4 x 7.5 x 3.8 cm. A seldom-seen, classic and very fine cabinet combination plate from the historic mines at Trepca. Snow-white balls of tiny, glassy siderite crystals richly and aesthetically cover the sculptural specimen of brassy pyrite pyritohedrons, dark gray arsenopyrite crystals and a small forest of quartz crystals. Throw in a few, colorless, poker-chip calcite crystals and you have an outstanding combination piece from this famous locale. Ex. Franz Saller Collection.
Featuring a 1.5 cm doubly-terminated crystal in a protective vug! Better in person! These specimens come from a small find hit before the show, and brought down by Rod and Helen Tyson of Tyson's Fine Minerals in Canada. They are really quite attractive for Brazilianite from this locality and to my knowledge are the best Brazlianites outside of those found in Brazil itself. They are quite a rare species from the otherwise productive phosphate localities in the Yukon. 4 x 3.5 x 2.1 cm
6.6 x 5 x 3.8 cm. A very attractive specimen featuring a 1.75-cm blue-purple apatite hanging off the side of a quartz cluster. The apatite is translucent and very lustrous. The piece is pristine on the front though it has a natural break and partial re-heal on the back of the larger quartz termination. Ex. Dr. Gary Hansen Collection.
A 12 cm quartz crystal elgantly straddles a large plate of bright arsenopyrite! The quartz itself is dusted with small siderite crysatls 15.5 x 12 x 5.7 cm
A monstrous specimen with the largest chalcopyrites I have yet seen from teh locality. Perched upon them are disc-shaped, lustrous brown siderite crystals and spiking out from the chalcos are several fine quartz points. An EXCEPTIONALLY LARGE specimen for the locality and in remarkably good shape! What is more, it displays nicely despite its size. Somebody took a lot of care getting it out! 19 x 11 x 7.5 cm
A superb arborescent cluster of brililantly metallic, bright arsenopyrite, with some contrasting siderites about its upper portion. A very elegant and sculptural specimen, i think.
11.3 x 7 x 4.3 cm
An exceptional rarity from the rares suite of the Zinn collection, featuring HUGE, wet-lustred lazulite crystals to just over 2 cm, perched on contrasting quartz matrix. In person they have a rich royal blue color and much sharper form than is apparent from the pictures. This is a MAJOR specimen for the species, and likely dates back aways to earlier finds from the 1970s. It is the best piece I persoanlly have ever seen for sale of this mineral, from Canada. 8.7 x 8.5 x 2.2 cm
An EXCELLENT plate covered with sparkly, gemmy, brown siderite crystals and dotted with with highly lustrous, dark blue lazulite crystals to 1.0 cm. Ex Marty Lewadny Collection of Winnipeg, Canada. 9.0 x 5.2 x 1.7 cm
Lustrous, very dark blue blades to 5 mm of the phosphate kulanite, with siderite crystals on matrix from the Type Locality in Canada. Ex Royal Ontario Museum and Lewadny Collections. 6.0 x 4.9 x 2.8 cm
An aesthetic specimen of lustrous, honey-brown siderite crystals to 7 mm nestled in a vug with radial clusters of brown, micro stilpnomelane crystals in sulfide matrix from the very famous Sterling Mine in Antwerp, New York. Choice and old material, seldom available today. 5.5 x 3.6 x 3.5 cm
Very aesthetic specimen of sharp brown-gray Siderites partially coating equally sharp white Quartz crystals. Almost pristine all around - just with one Quartz crystal missing; and so the overall elegance of this is hard to deny. A very fine specimen. 3.2 x 2.8 x 1.9 cm
A striking combination piece with most major minerals from the locality well-represented. Each contrasts nicely with the colors of the other, and each is lustrous as well. The overall effect on this large specimen is to create a really impressive combination specimen , quite uncommon for this now-defunct locality.
10.7 x 9.5 x 4.1 cm
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Rob Lavinsky, rob@irocks.com
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share specimen![Siderite, Calcite from Lovilia area, Monroe Co., Iowa, USA [db_pics/mdpics/MD-283231a.jpg]](db_pics/mdpics/MD-283231a.jpg)
![Siderite, Calcite from Lovilia area, Monroe Co., Iowa, USA [db_pics/mdpics/MD-283231b.jpg]](db_pics/mdpics/MD-283231b.jpg)
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![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-284806b.jpg]](db_pics/mdpics/MD-284806b.jpg)
![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-284806c.jpg]](db_pics/mdpics/MD-284806c.jpg)
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![Siderite, Arsenopyrite, Pyrite, Quartz from Trepča complex, Trepča valley, Kosovska Mitrovica, Kosovo [db_pics/mdpics/MD-285134b.jpg]](db_pics/mdpics/MD-285134b.jpg)
![Siderite, Arsenopyrite, Pyrite, Quartz from Trepča complex, Trepča valley, Kosovska Mitrovica, Kosovo [db_pics/mdpics/MD-285134c.jpg]](db_pics/mdpics/MD-285134c.jpg)
![Siderite, Arsenopyrite, Pyrite, Quartz from Trepča complex, Trepča valley, Kosovska Mitrovica, Kosovo [db_pics/mdpics/MD-285134d.jpg]](db_pics/mdpics/MD-285134d.jpg)
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![Apatite, Quartz, Siderite from Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-34538b.jpg]](db_pics/mdpics/MD-34538b.jpg)
![Quartz, Siderite, Arsenopyrite from Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-34539a.jpg]](db_pics/mdpics/MD-34539a.jpg)
![Siderite, Chalcopyrite from Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-34540a.jpg]](db_pics/mdpics/MD-34540a.jpg)
![Arsenopyrite, Siderite from Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-34549a.jpg]](db_pics/mdpics/MD-34549a.jpg)
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![Siderite, Stilpnomelane from Sterling mine, Antwerp, Jefferson Co., New York, USA [db_pics/mdpics/MD-38073a.jpg]](db_pics/mdpics/MD-38073a.jpg)
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