Mineral Specimens with Siderite

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OLDEURO-61 - Galena with Calcite and Siderite - SOLD
Neudorf, Saxony-Anhalt, Germany
small cabinet, 8.0 x 6.5 x 3.3 cm

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A rich, lustrous specimen of sharp galena crystals accented by siderite and sparkling calcite, from this classic locality.

ORDWAY-69 - Pyrrhotite with Sphalerite and Siderite - $ 1500
Trepca, Yugoslavia
large cabinet, 16.0 x 14.0 x 8.9 cm

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ex. Al Ordway

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Composed of unusually thickly-interwoven, lustrous, brassy yellow crystals of pyyrhotite to 6.5 cm on edge, this specimen also is decorated by a few lustrous black sphalerite crystals to 1 cm across. In addition, the whole specimen is studded with rounded aggregates of rhombohedral, tan siderite, to 5 mm across. Nice color contrast, and a sharp metallic, carved look to it, make this piece stand out. As well, it is HUGE for this old classic locale! This monster classic weighs 7.5 pounds!

PAS-139 - Siderite, on Pyrite - SOLD
Llallagua, La Joya district, Cercado Province, Oruro Department, Bolivia
small cabinet, 7.0 x 5.1 x 3.5 cm

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ex. Philadelphia Academy of Natural Sciences

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An unusual specimen with sharp hexagonal siderite crystals perched upon pyrite. Very unusual for the locality!

PAS-70 - Siderite - SOLD
Roxbury, Litchfield Co., Connecticut, USA
cabinet, 11.6 x 9.7 x 5.0 cm

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ex. Philadelphia Academy of Natural Sciences

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e Roxbury Iron Mines are very famous and first discovered in 1750! They were a big part of early American mining. This is a hefty specimen of solid siderite, with sharp, really lustrous crystals atop a 3-dimensional knoll of the massive siderite below. It is very attractive, with an unusually good lustre frankly unlike anything else I have seen from the US and very similar to material from Stolberg in the old Harz district, Germany. This is a large, impressive, showpiece.

PB66 - Siderite with Dolomite - SOLD
Morro Velho Gold Mine, Nova Lima, Minas Gerais, Brazil
large cabinet, 16.1 x 14.6 x 11.1 cm

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ex. Peter Bancroft

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Discoidal crystals of gemmy, lustrous, amber-yellow, siderite to 3.0 cm across are interspersed with colorless, lustrous, Dolomite crystals that also reach almost 3.0 cm across. The combination of the two carbonate species together is not unusual since they are both part of the same mineral series, although the aesthetics of the mix really IS unusual! Only a few areas of contact/damage exist on this large specimen. I cannot say as I have seen another piece so large from this mine, of the famous siderite it produced in the 70s and 80s. This is large and beautiful, and probably among the largest surviving example sof this classic siderite.

RARE08-2-16 - Kegelite with Siderite - SOLD
Tsumeb, Namibia (TYPE LOCALITY)
thumbnail, 2.7 x 2.7 x 2.2 cm

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ex. Eric Asselborn
ex. Walter Kahn

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Kegelite with Siderite from Tsumeb, Namibia (TYPE LOCALITY) [db_pics/pics/rare08-2-16a.jpg]

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Kegelite with Siderite from Tsumeb, Namibia (TYPE LOCALITY) [db_pics/pics/rare08-2-16b.jpg]

Eric Asselborn bought this remarkably rich specimen of kegelite from the family of Tsumeb Mine manager Walter Kahn, and it remains to this day one of the richest examples of the species I or friends have seen (confirmed with Bill Pinch and Mark Feinglos, in particular). It is a trim I made off of an amazing 6x5cm specimen Kahn was known to have from the first pocket identified and which I also have for sale . The somewhat gemmy brown-red crystal in the middle is a remarkably sharp and lustrous siderite, easily mistaken for a crazily good stottite but sadly not. However, it is a nice accent to the rolling carpet of extremely rich, microcrystalline kegelite which covers the specimen. (TYPE LOCALITY)

RH1-22 - Siderite - SOLD
Farmsen, Hanover, Germany
small cabinet, 7.9 x 5.9 x 5.8 cm

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ex. Richard Hauck

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Siderite from Farmsen, Hanover, Germany [db_pics/pics/rh1-22a.jpg]

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Siderite from Farmsen, Hanover, Germany [db_pics/pics/rh1-22b.jpg]

Originally in the collection of noted German mineral enthusiast, Werner Lieber, this siderite specimen features three stalactitic growths. The crystals have a dark, greenish-yellow, highly lustrous, bladed, appearance. I must say that this is one of the nicest siderite specimens I have seen from Germany. BETTER in person!

SN24 - Siderite - $ 150
Julcani, Huancavelica, Peru
thumbnail, 2.5 x 2.1 x 2 cm

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ex. Sam Nasser

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Siderite from Julcani, Huancavelica, Peru [db_pics/pics/sn24a.jpg]

A rare specimen from a small pocket of these incredibly euhedral siderites, found perhaps 6 years back VERY lustrous and sparkly, better in person, remarkable for species!.

SN49 - Siderite on Fluorite - SOLD
Naica, Chihuahua, Mexico
thumbnail, 2.7 x 2.4 x 1.9 cm

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ex. Sam Nasser

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Siderite on Fluorite from Naica, Chihuahua, Mexico [db_pics/pics/sn49a.jpg]

a rare combo from the locale, cannot say i have seen before.

T06-160 - Apatite with Siderite - SOLD
Panasqueira, Portugal
small cabinet, 9.2 x 7.4 x 6.9 cm

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This is a huge, fine crystal of fluorapatite from the world famous Panasqueira deposit which has arguably produced the finest specimens of this species. This crystal is literally monstrous for the locality! It consists of a deeper-colored green core covered by a layer of secondary apatite. The gray-green crystal is glassy, translucent and is studded with tan rhombs of siderite, to 2.0 cm across. There is minor edge wear but this is one super fluorapatite where , in the context of the remarkable size, a bit of edge wear is certianly forgiveable I think. It is very nearly complete all around, impaled upon a ferberite crystal that partially sticks out the backside

T06-61 - Galena, Siderite, Calcite - SOLD
Neudorf, Harz Mtns., Germany
small cabinet, 7 x 5.3 x 3 cm

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Galena, Siderite, Calcite from Neudorf, Harz Mtns., Germany [db_pics/pics/t06-61a.jpg]

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Galena, Siderite, Calcite from Neudorf, Harz Mtns., Germany [db_pics/pics/t06-61b.jpg]

One of the most fervently treasured of all German classics are these metallic, carved-looking galenas from the Harz, circa the mid-1800's. The best of them have contrasting association with siderite. This one, as well, has calcite for further accent - I have never seen before! It is a very attractive specimen, and has excellent quality 2 cm crystals on the front display, balanced above the contrasting carbonates. It is contacted on the sides and back, but the display face is so good. I have seen very few for sale in recent years, and they tend to be extremely expensive - I saw dribs and drabs of half the quality for twice the price in Munich on the European market where they are so highly valued, in fact.

T06-98 - Chalcostibite on Siderite - SOLD
Saint-Pons, Ubaye valley, Alpes-de-Haute-Provence, Provence-Alpes-C�te d'Azur, France
miniature, 6 x 3.9 x 3.6 cm

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Superb, sharp chalcostibite crystals in a "bowtie" cluster atop matrix, make this one of the better ones I have seen for sale in recent years. This was found at what really is an old classic locality, but recently in a lucky find of the early 1990s. Most people consider these to be the best examples of their species, for display purposes.

T5165 - Brazilianite with Siderite - SOLD
Rapid Creek, Yukon, Canada
miniature, 4 x 3.5 x 2.1 cm

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Brazilianite with Siderite from Rapid Creek, Yukon, Canada [db_pics/pics/t5165a.jpg]

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Brazilianite with Siderite from Rapid Creek, Yukon, Canada [db_pics/pics/t5165b.jpg]

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.

Tmix07-155 - Siderite/Sphalerite cast after Calcite - SOLD
Aggenys Mine, Northern Cape Province, South Africa
miniature, 4.5 x 3.8 x 3.5 cm

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From a small find that was brought out at Munich, these are specimens I bought there a tthe show in 2006 but only got ahold of in a shipment back to me at Tucson. These are VERY unusual crystals in that they are hollow casts after calcite, and the coating is a true mixture of sphalerite and siderite (almost an amalgam?!). They have been extensively analysed in South Africa, to come up with this conclusion. So far as I am awware, this is a first. I selected just a few specimens on the run at Munich with regards to getting pieces with superior 3-dimensional form, a good surface shimmer (almost metallic!), and no damage. I think these pieces were, from what I saw, among the best for quality that could be had. This one is a complete crystal, all around, very 3-dimensional (more so in person!)

Tmix07-157 - Siderite/Sphalerite cast after Calcite - $ 600
Aggenys Mine, Northern Cape Province, South Africa
small cabinet, 7.0 x 6.3 x 4.9 cm

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Siderite/Sphalerite cast after Calcite from Aggenys Mine, Northern Cape Province, South Africa [db_pics/pics/tmix07-157a.jpg]

Siderite/Sphalerite cast after Calcite from Aggenys Mine, Northern Cape Province, South Africa [db_pics/pics/tmix07-157a.jpg]

From a small find that was brought out at Munich, these are specimens I bought there a tthe show in 2006 but only got ahold of in a shipment back to me at Tucson. These are VERY unusual crystals in that they are hollow casts after calcite, and the coating is a true mixture of sphalerite and siderite (almost an amalgam?!). They have been extensively analysed in South Africa, to come up with this conclusion. So far as I am awware, this is a first. I selected just a few specimens on the run at Munich with regards to getting pieces with superior 3-dimensional form, a good surface shimmer (almost metallic!), and no damage. I think these pieces were, from what I saw, among the best for quality that could be had. This specimen is one of the bettre clusters I saw, for the size, and has a wonderful surface sheen and shimmer to it, much more evident and almost golden, in person!

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Rob Lavinsky, rob@irocks.com

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