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Mineral Specimens with Siderite
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3.3 x 3.0 x 2.1 cm. This is a fine specimen of the very rare iron phosphate featuring wonderful, sharp, somewhat lustrous, gemmy, green crystal groups of Ludlamite sitting atop brown Siderite matrix. The Ludlamite crystal group measures 1.0 cm across. PLEASE NOTE: There have been no more of these specimens found in the last 7 years from this locality, and it is a possibility there will never be any more due to the fact that the mine has now been nationalized, and is the miners have zero opportunity to collect specimen.
8.8 x 6.7 x 3.7 cm. Bolivia has probably produced more tin than any other country in the world. The great tin mines at Viloco (sometimes called Araca) have produced some of the most magnificent Cassiterite specimens extant. This piece features sharp, highly lustrous, somewhat gemmy, brown and black color, cyclic twinned Cassiterite crystals measuring up to 9 mm associated with small tan Siderite discs and gemmy Quartz crystals. This specimen was actually mined about 20 years ago when Viloco was really pumping out specimens.
5.7 x 4.6 x 2.6 cm. The mine at Huanuni has produced some of the finest Vivianite specimens in the world, but fine quality specimens have all but disappeared from the market since the mine was taken over by the Bolivian government several years ago. Due to the vast tin deposits in this mine, removing colorful phosphates is strictly forbidden, and the levels upon which these beautiful specimens are found have been intentionally flooded to keep the miners out. This specimen features a few sharp, lustrous, gemmy, rich blue-green color prismatic crystals measuring up to 2.5 cm long on sparkling brown Siderite matrix. This is from a find from about the mid 1990s, when there was a relative bonanza at Huanuni for Vivianites. About ten years later, there were no more specimens, and there truly hasn't been since. Ex. Brian Kosnar Collection.
Much nicer in person, these are large, very lustrous, very sharp deep blue crystals of lazulite (to 0.9 cm) with GEMMY little siderites accenting them! There is one area of damage/contact towards the bottom, but really, this is a very good specimen for the species and locality! Old material better than what has recently been found here. 4.8 x 3.5 x 2.3 cm
4.2 x 3.2 x 2.9 cm. A classic and fine combination specimen from the 1960s finds at the Morro Velho Mine of Brazil. Lustrous, brassy, tabular cubanite crystals are richly and aesthetically scattered on the mounded matrix of glassy, yellow-green siderite blades and translucent, light gray dolomite rhombs. Some of the cubanites are beautifully iridescent and the large siderite is 2.2 cm. A highly representative and showy, two-sided piece from this well-known find and locale. Ex. Scott Williams Collection.
3.6 x 3.1 x 2.3 cm. Park and Teller Counties in Colorado are best known for producing some of the most magnificent Amazonite specimens in the world. There aren't many species associated with the Amazonite, mostly Quartz, Albite, Fluorite and sometimes Hematite. The majority of the Hematite specimens from this area are often found as pseudomorphs after Siderite. This particular specimen features a very attractive, excellent, sharp, aesthetic rhombic crystal of Siderite which has been replace by Hematite and is associated with golden-brown Goethite and minor contrasting pink Microcline. The specimen was collected by Richard Kosnar on May 28 1982 while on a collecting trip with his good friend Erberto Tealdi (former editor of Rivista Mineralogica Italiana). According to Rich Kosnar's label that accompanies the piece, it is very rare to find both Goethite and Hematite together, and this particular association is unique to the Lake George area of Colorado. A very attractive, and hard to find Hematite pseudomorph association specimen. Ex. Richard Kosnar Collection.
3.0 x 3.0 x 2.3 cm. This specimen was collected in very recently (within the last few months - 2009). It hails from one of the most exciting Bolivian localities of the last 10 years. It hosts several attractive, sharp, tabular, metallic, silvery-grey color crystals with great form and sharp faces. The crystals are sitting amongst golden Siderite and sparkling Pyrite matrix. For the quality, these new specimens have created a lot of excitement, so much so that one of the best pieces was featured on the cover of the March/April 2009 Issue of the Mineralogical Record. This specimen is from the same mine and possibly the same exact pocket as the cover specimen.
9.0 x 6.5 x 1.9 cm. This material was some of the first to come out of Bolivia in a long time. This piece features dozens of large (for this mine), sharp, highly lustrous, gemmy crystals measuring up to 8.5 mm of Augelite associated with greenish-brown compressed rhombohedra of Siderite with Pyrite and micro Quartz on matrix. This specimen is from the find about 7 years ago, when some of the most impressive Augelites came out of Tazna.
2.9 x 2.6 x 1.7 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 several excellent, sharp, gemmy, greenish-brown crystals of Siderite measuring up to 1.0 cm which are sitting upon an unusual crystal of lustrous Pyrite (possibly a pseudomorph after Siderite) which are associated with minor grey crystals of the rare sulfide, Stannite. For Siderite, the quality is impressive for Bolivia, as I rarely have seen such sharp and gemmy crystals from any Bolivian locality. So far, this find was very limited.
5.0 x 5.0 x 2.6 cm. Lustrous and glassy, olive-green apatite prisms to 1.3 cm preferentially coated with tan siderite disks form an aesthetic specimen from the Panasqueira Mine. The specimen has a very nice sculptural form. The backside is totally covered with siderite disks. Classic combination material from this noted locale. Ex. Wes Parker Collection. This piece overall is a floater, complete-all-around.
4.6 x 4.4 x 2.8 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. I directly obtained this specimen from the miner who collected it, so I know for certain where it came from. This piece features several excellent, sharp, gemmy, greenish-brown crystals of Siderite measuring up to 0.8 cm which are sitting upon unusual crystals of lustrous Pyrite (which are actually pseudomorphs after Siderite) which are associated with minor grey crystals of the rare sulfide, Stannite. For Siderite, the quality is impressive for Bolivia, as I rarely have seen such sharp and gemmy crystals from any Bolivian locality. So far, this find was very limited.
6.9 x 3.8 x 3.0 cm. A striking, yet truly unusual specimen from the 2nd Sovietskiy Mine at Dal’negorsk. A fine cluster of glassy, nearly transparent, modified fluorite cubes sprinkled with flesh-colored siderite is perched atop a natural, quartz-rich, "egg". The egg is also peppered with tiny siderites. And the protruding clusters of quartz crystals add character to the "egg". The "egg" looks likes its hatching, with the quartz crystals coming out of the bottom. All of the major fluorites in the cluster are pristine. A strange, but very interesting Dal’negorsk specimen.
6.1 x 4.3 x 4.0 cm. A classic and fine pseudomorph from the Pikes Peak Pluton of Colorado and the Wes Parker Collection. Hematite pseudomorphs extremely sharp siderite rhombs to 2.4 cm. The aesthetic cluster of pseudomorphs is beautifully perched on starkly contrasting microcline. A very fine, two-sided pseudomorph, that is essentially damage-free.
12.8 x 6.4 x 4.8 cm. A classic, old-time, cabinet specimen of yellow fluorite crystals accented with bladed, brown siderite crystals from the historic mines of Cumbria, England. The glassy, nearly transparent, interpenetrating cubes reach to 2 cm and totally cover the elongate, sculptural specimen. Yellow English fluorites are relatively uncommon compared to purple and green fluorite and this is an large example. Superb purple fluorescence. Ex. Robert Sullivan Collection, an East Coast miner/collector.
5.5 x 4 x 3 cm. Sharp, lustrous crystals of sphalerite to 1.3 cm across, perched on golden siderite. The crystal is really quite brilliant - better in person. This locality is of course classic for the world-renowned galenas, but I would guess sphalerite is just as uncommon if not more so. This is certainly an old specimen. The label with it dates it to 1955, but I would assume it was mined long before. Still, the exact mine name was preserved which is unusual and nice to know.
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Rob Lavinsky, rob@irocks.com
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share specimen![Ludlamite, Siderite from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [db_pics/mdpics/MD-242342a.jpg]](db_pics/mdpics/MD-242342a.jpg)
![Ludlamite, Siderite from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [db_pics/mdpics/MD-242342b.jpg]](db_pics/mdpics/MD-242342b.jpg)
![Ludlamite, Siderite from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [db_pics/mdpics/MD-242342c.jpg]](db_pics/mdpics/MD-242342c.jpg)
![Cassiterite, Siderite, Quartz from Viloco Mine (Araca mine), Loayza Province, La Paz Department, Bolivia [db_pics/mdpics/MD-243428a.jpg]](db_pics/mdpics/MD-243428a.jpg)
![Cassiterite, Siderite, Quartz from Viloco Mine (Araca mine), Loayza Province, La Paz Department, Bolivia [db_pics/mdpics/MD-243428b.jpg]](db_pics/mdpics/MD-243428b.jpg)
![Vivianite, Siderite from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [db_pics/mdpics/MD-246304a.jpg]](db_pics/mdpics/MD-246304a.jpg)
![Vivianite, Siderite from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [db_pics/mdpics/MD-246304b.jpg]](db_pics/mdpics/MD-246304b.jpg)
![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-24631a.jpg]](db_pics/mdpics/MD-24631a.jpg)
![Cubanite, Siderite, Dolomite from Morro Velho mine (incl. Mina Velha; Mina Grande), Nova Lima, Iron Quadrangle, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-246453a.jpg]](db_pics/mdpics/MD-246453a.jpg)
![Cubanite, Siderite, Dolomite from Morro Velho mine (incl. Mina Velha; Mina Grande), Nova Lima, Iron Quadrangle, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-246453b.jpg]](db_pics/mdpics/MD-246453b.jpg)
![Hematite, Siderite, Goethite from R. A. Kosnar claim, Yucca Hill, Steven's Ranch, Lake George, Park Co., Colorado, USA [db_pics/mdpics/MD-249077a.jpg]](db_pics/mdpics/MD-249077a.jpg)
![Bournonite, Siderite, Pyrite from Machacamarca Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosí Department, Bolivia [db_pics/mdpics/MD-250330a.jpg]](db_pics/mdpics/MD-250330a.jpg)
![Augelite, Siderite from Tazna Mine (Tasna Mine; Tazna-Rosario Mine), Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-251005a.jpg]](db_pics/mdpics/MD-251005a.jpg)
![Augelite, Siderite from Tazna Mine (Tasna Mine; Tazna-Rosario Mine), Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-251005b.jpg]](db_pics/mdpics/MD-251005b.jpg)
![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-251017a.jpg]](db_pics/mdpics/MD-251017a.jpg)
![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-251017b.jpg]](db_pics/mdpics/MD-251017b.jpg)
![Apatite-(CaF), Siderite from Panasqueira Mines, Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-252607a.jpg]](db_pics/mdpics/MD-252607a.jpg)
![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-253901a.jpg]](db_pics/mdpics/MD-253901a.jpg)
![Siderite, Pyrite, Stannite from Siete Suyos mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia [db_pics/mdpics/MD-253901b.jpg]](db_pics/mdpics/MD-253901b.jpg)
![Fluorite, Siderite, Quartz from 2nd Sovietskii Mine (2nd Sovietskiy Mine), Dal'negorsk (Dalnegorsk; Tetyukhe; Tjetjuche; Tetjuche), Primorskiy Kray, Far-Eastern Region, Russia [db_pics/mdpics/MD-253938a.jpg]](db_pics/mdpics/MD-253938a.jpg)
![Hematite, Siderite, Microcline from Pikes Peak Granite, Park Co., Colorado, USA [db_pics/mdpics/MD-253983a.jpg]](db_pics/mdpics/MD-253983a.jpg)
![Fluorite, Siderite from Cumbria, England, UK [db_pics/mdpics/MD-253991a.jpg]](db_pics/mdpics/MD-253991a.jpg)
![Fluorite, Siderite from Cumbria, England, UK [db_pics/mdpics/MD-253991b.jpg]](db_pics/mdpics/MD-253991b.jpg)
![Fluorite, Siderite from Cumbria, England, UK [db_pics/mdpics/MD-253991c.jpg]](db_pics/mdpics/MD-253991c.jpg)
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![Sphalerite, Siderite, Quartz from Pfaffenberg Mine, Neudorf, Harzgerode, Harz Mts, Saxony-Anhalt, Germany [db_pics/mdpics/MD-254274b.jpg]](db_pics/mdpics/MD-254274b.jpg)
![Sphalerite, Siderite, Quartz from Pfaffenberg Mine, Neudorf, Harzgerode, Harz Mts, Saxony-Anhalt, Germany [db_pics/mdpics/MD-254274c.jpg]](db_pics/mdpics/MD-254274c.jpg)