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Mineral Specimens with Siderite
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7.2 x 3.5 x 2.4 cm. Discrete and isolated cryolite crystals are RARE. This SUPERB specimen is LOADED with crystals to 7 mm on massive cryolite and galena matrix. For the last 200 years, these colorless and lustrous, pseudo cubes, of cryolite, from Greenland, a rare sodium, aluminum, fluoride, have been the standard for the species. The locality is not only now long gone, it’s underwater. They mined it below sea level, to get cryolite as an important flux agent for the refining of aluminum. Rust colored siderite is nicely interspersed between the cryolite crystals. This is a very showy, excellent, and good-sized example of this now-vanished species. Ex. Paul Stahl Collection.
4.3 x 4.0 x 3.0 cm. Two sprays of lustrous, greenish-yellow millerite needles to 1.4 cm are aesthetically set in a vug lined with yellow siderite discs and quartz in this showy piece from a classic Welsh locality - the Coed-Ely Coal Mine. Excellent and showy material from the George Elling Collection.
5.2 x 4.8 x 2.2 cm. A VERY RICH and showy plate covered with highly lustrous, indigo-blue lazulite crystals to 8 mm. This fine piece is nicely accented with a scattering of gemmy, golden-amber siderite crystals. This is excellent quality combination material, essentially pristine, from the famed Rapid Creek locality in Canada from an old stash.
4.4 x 3.6 x 3.4 cm. A super-sharp specimen of siderite from the now-closed Mt. Ste Hilaire locality in Canada. This sharp specimen is distinguished by having a small rhomb artfully arranged right on top of the larger one, poking out from its corner! It has the typical deep-olive color for these.
7.1 x 5.7 x 2.4 cm. A VERY RICH and showy specimen covered on both sides with highly lustrous, indigo-blue lazulite crystals to 1.0 cm. The front of this fine piece is beautiful combination of gemmy, golden-amber siderite crystals and lazulite crystals. This is excellent quality combination material, even with the bruising on the back. The specimen hails from the famed Rapid Creek locality in Canada, which I recently obtained from an old stash. All the major crystals on the front are pristine, except two, one being on the periphery.
5.8 x 4.5 x 2.6 cm. An AESTHETIC one of these Colorado pseudomorphs of sharp, moderate lustre hematite after siderite rhombs very nicely perched on a contrasting, off-white feldspar crystal from Crystal Park. CLASSIC, very fine material from a famous locality- most are so UGLY! The large crystal on the upper left is 2.3 cm.
4.2 x 3.7 x 1.7 cm. KILLER, GEM siderite rhombs from Morro Velho, Brazil. This aesthetic, two crystal cluster of sharp, highly lustrous, step-faced growth, yellow-green siderite rhombs is superb. Morro Velho siderite is considered among the finest in the world and you can see why.
6.4 x 3.4 x 2.9 cm. A gormanite specimen (a phosphate unfamiliar to many: Fe++3Al4(PO4)4(OH)6•2(H2O) of rare quality from Rapid Creek (known mostly for its lazulites), a really great specimen for what it is! There is one rather large, brushy cluster here, and several smaller sprays speckled about. The gormanite is beautifully isolated on a bed of transparent siderite crystals, which is another reason this specimen is special.
5.9 x 3.5 x 1.7 cm. A VERY RICH and showy plate covered with highly lustrous, indigo-blue lazulite crystals to 8 mm. This fine piece is beautifully accented with gemmy, golden-amber siderite crystals. This is excellent quality combination material, with only some minor periphery bruising, from the famed Rapid Creek locality in Canada, which I recently obtained from an old stash. All of the primary lazulite crystals are pristine.
8.0 x 6.8 x 4.1 cm. A HIGHLY UNUSUAL and showy, old-time specimen from the famous Mina Ojuela of ultra-sparkly siderite microcrystals festooned on a sculpturally shaped box-work matrix of bladed calcite crystals. I have never seen another Mina Ojuela siderite remotely approaching this one. Ex. George Elling Collection.
4.1 x 3.5 x 2.9 cm. A superb competition-level miniature featuring a fan spray of thin, translucent siderite crystals to 4 cm, perched upon a knoll of sparkling white quartz! The aesthetics are great for any siderite from any locality, and the significance of the large crystals from this particular historic location is also a bonus to the intrinsic quality for the species. From the miniature rarities suite of Lawrence Conklin. Almost certainly found in the mid to late 1800s and remarkably, despite its apparent fragility, preserved intact since. This is complete all around and displays from both sides.
5.6 x 3.6 x 3.3 cm. A matrix consisting of tabular rhombs of lustrous, tan siderite, to .6 cm across, hosts aesthetically perched crystals, to 2.5 cm across, of glassy and gemmy, light green fluorapatite. A very nice combo specimen with great presentation of the major crystal! Some very small damage only and overall a fine piece from the 1970s heyday here. From the collection of James E. Moresby White. Ex. Carnegie Museum Collection.
11.9 x 10.2 x 6.7 cm. This is an OLD English specimen of a classic association from the Derbyshire mining district - golden-brown, microcrystalline bladed siderite with fluorite. There is a WHOPPER crystal of fluorite here that gives the specimen a lot of structure and character, rather than being just a blob: it measures 5 cm across the edge (!), and is free of siderite at one end - this side of the other crystals is exposed as well. Tiny gem-like crystals of quartz have grown on the exposed surfaces of the fluorites.
3.2 x 2.1 x 2.0 cm. The Lake George area of Colorado is 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 the Lake George area are often found as pseuomorphs after Siderite. This particular specimen features a gorgeous cluster of excellent, sharp, aesthetic rhombic crystals of Siderite which have been replace by Hematite and are sitting atop beautifully contrasing pink Microcline. The specimen was collected by Richard Kosnar in the Summer of 1977. A very attractiv, and hard to find Hematite pseudomorph from this historic area in Colorado. Ex. Richard Kosnar Collection.
5.2 x 4.4 x 2.9 cm. A strange and pretty mineral specimen out of the Sussman Collection, which is notable for its fine Namibian suite of minerals. This is a pseudomorph of limonite after a compound crystal of razor-sharp siderite, showing staggered rhombohedral forms. On the front face, you can see slender crystals of red rutile embedded in the face of the crystal! The specimen is actually light in the hand, as it is basically the same as rust chemically - though a whole lot prettier and obviously a significant and unusual enough specimen for the Sussmans to have in their collection. Sharpest crystal seen in a pocket they bought about 4 years ago.
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Rob Lavinsky, rob@irocks.com
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share specimen![Cryolite, Siderite from Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland [db_pics/mdpics/MD-132459a.jpg]](db_pics/mdpics/MD-132459a.jpg)
![Cryolite, Siderite from Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland [db_pics/mdpics/MD-132459b.jpg]](db_pics/mdpics/MD-132459b.jpg)
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![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-135180a.jpg]](db_pics/mdpics/MD-135180a.jpg)
![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-135180b.jpg]](db_pics/mdpics/MD-135180b.jpg)
![Siderite from Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada [db_pics/mdpics/MD-137769a.jpg]](db_pics/mdpics/MD-137769a.jpg)
![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-137983a.jpg]](db_pics/mdpics/MD-137983a.jpg)
![Hematite, Siderite from Crystal Peak area, Teller Co., Colorado, USA [db_pics/mdpics/MD-142416a.jpg]](db_pics/mdpics/MD-142416a.jpg)
![Siderite from Morro Velho mine (incl. Mina Velha; Mina Grande), Nova Lima, Iron Quadrangle, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-144989a.jpg]](db_pics/mdpics/MD-144989a.jpg)
![Gormanite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-152642a.jpg]](db_pics/mdpics/MD-152642a.jpg)
![Gormanite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-152642b.jpg]](db_pics/mdpics/MD-152642b.jpg)
![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-154612a.jpg]](db_pics/mdpics/MD-154612a.jpg)
![Lazulite, Siderite from Rapid Creek, Dawson Mining District, Yukon Territory, Canada [db_pics/mdpics/MD-154612b.jpg]](db_pics/mdpics/MD-154612b.jpg)
![Siderite, Calcite from Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico [db_pics/mdpics/MD-154671a.jpg]](db_pics/mdpics/MD-154671a.jpg)
![Siderite, Quartz from Camborne - Redruth - St Day District, Cornwall, England, UK [db_pics/mdpics/MD-154929a.jpg]](db_pics/mdpics/MD-154929a.jpg)
![Apatite-(CaF), Siderite from Panasqueira, Covilhã, Castelo Branco District, Portugal [db_pics/mdpics/MD-158443a.jpg]](db_pics/mdpics/MD-158443a.jpg)
![Siderite, Fluorite from Derbyshire, England, UK [db_pics/mdpics/MD-163910a.jpg]](db_pics/mdpics/MD-163910a.jpg)
![Hematite, Siderite from R. A. Kosnar claim, Yucca Hill, Steven's Ranch, Lake George, Park Co., Colorado, USA [db_pics/mdpics/MD-164051a.jpg]](db_pics/mdpics/MD-164051a.jpg)
![Limonite, Siderite, Rutile from Gamsberg, Khomas Region, Namibia [db_pics/mdpics/MD-165642a.jpg]](db_pics/mdpics/MD-165642a.jpg)