Minerals
Gunnar Färber
Minerals
Gunnar Färber
| Uedaite-(Ce) (xx) | Iizaka Pegmatit-field, Kawamata, Fukushima Pref., Honshu Island / Japan; highly lustrous black aggregates of pure Uedaite-(Ce). This Manganese analog of Allanite-(Ce) has till now been known only as a great rarity in pegmatites in Manganese-bearing Granite on Honshu Island. Collected around 1980; MM 95,00 |
| Ulexite | U.S. Borax Mine, Boron, Kern Co., California / USA; cut and polished colorless to white specimens of 5 cm x 3 cm x 1,5 cm, with a very nice TV effect; NS 19,00 |
| Ulexite (xx) | U.S. Borax Mine, Boron, Kern Co., California / USA; "pseudomorphs from Ulexite after Borax crystals". Greyish-white well develop duoble terminated single crystals of 2,5 cm (KS) to 4 cm (NS); KS 19,00; NS 28,00 |
| Ulexite xx | Rüsselsee Quarry, Appenrode, Ellrich, Harz Mts., Thuringia / Germany; silky white fibrous aggregates to 1 cm, very rich on vugs in Anhydrite-Gypsum matrix. Ulexite from Germany is quite unusual; KS 28,00; NS 38,00; HS 65,00 |
| Ullmannite (xls) | Silberquelle Mine, Obersdorf, Siegerland, North Rhine-Westphalia / Germany; grey metallic crystal aggregates of 2 cm with some brownish Siderite; KS 19,00 |
| Umangite (xx) | Sierra de Cacho, La Rioja / Argentina / TYP; violet metallic massive Umangite with some blue Chalcomenite. A specimen from the type location for Umangite. (even Umangite is named after Sierra de Umango, the right location is located in the parallel mountain range the Sierra de Cacho); MM 28,00 |
| Umangite xls | Hal Lake Selenium Occurrence Nr. I, Uranium City, Beaverlodge Lake, Saskatchewan / Canada; the rare Copper Selenide occurs as violet metallic crystal aggregates up to 2 cm on brownish Rhyolite matrix. Very nice specimens from a new find; |
| Uraninite (xx) | Vater Abraham Mine, Lauta, Marienberg, Erzgebirge, Saxony / Germany; "Pseudomorphs from Uraninite after Dolomite crystals" black rhombohedral crystals of 2 cm in matrix. Such unique pseudomorphs are known world-wide only from sporadic finds at Marienberg from1970 to 1980; KS 48,00; NS 95,00 |
| Uranopilite xls | Pick's Delta Mine, Delta, San Rafael District, Emery Co., Utah / USA; yellow radial acicular glassy crystals of 1 mm, inter grown to massive crystal aggregates with Gypsum and Uraninite. Quite rich specimens of the rare Uranium-Sulfate; |
| Uranopolycrase xx | Flakaberget Pegmatite, Jokkmokk, Lapland / Sweden; lustrous dark brownish crystal aggregates of 1 cm, very rich in Feldspar-Muscovite matrix. Nice specimens from a new find in July 2013; KS 38,00; NS 75,00 |
| Uranosilite (xx) | Mina Huemul, Pampa Amarilla, Malargüe Dept., Mendoza / Argentinia; yellow aggregates of minute crystals with some greenish yellow radial acicular Weeksite in black massive Coffinite; MM 75,00 |
| Uranosphaerite xls | Christa Mine, Großschloppen, Weißenstadt, Fichtelgebirge, Franconia, Bavaria / Germany; this rare Bismuth-Uranium-Oxide forms orange crystal aggregates of 2 mm, together with yellow acicular 1 cm crystal aggregates of Uranophane, on large fracture zones in Quartz matrix; KS 38,00; NS 65,00 |
| Uranotungstit (xx) | Johanngeorgenstadt, Erzgebirge, Sachsen / Deutschland; gelbe fein kristalliene Aggregate dicht verwachsen mit einem Tonmineral, als gelbe Kristallkrusten auf Metatorbernit und Quarz. Uranotungstit von Johanngeorgenstadt ist bisher nur von einer einzigen historischen Stufe bekannt; MM 65,00 |
| Urea xx | Wilgie Mia Cave, 70 km north of Cue, Weld Range, Western Australia / Australia; long-prismatic single colorless crystals of 5 mm; approx. 25 crystals in a capsule. The 30,000-year-old Cave of Wilgie Mia is probably one of oldest mines in the world. The Aborigines used the ochre from there for their cave paintings; MM 28,00 |
| Urusovite xls | Novaya Fumarole, Tolbachik Volcano, Kamchatka, Far-Eastern Region / Russia / TYP; this extremely rare Cu-Al Arsenate forms glassy green crystals of 1 mm, with some Tenorite crystals on scoria matrix; MM 48,00; KS 95,00 |
| Uvarovite xx | Keretti Mine, Outokumpu, Eastern Finland Region / Finland; dark green well terminated crystal of 5 mm on pale green Diopside matrix; KS 38,00 |
| Uvite xx | Pomba Pit, Brumado, Serra das Aguas, Bahia / Brazil; highly lustrous transparent greenish-brown crystals to 1 cm with colorless Magnesite crystals to 5 mm on matrix. Very attractive specimens from a recent find; NS 28,00 |
| Uzonite xx | Uzon Caldera, Kamchatka Peninsula, Far-Eastern Region / Russia / TYP; yellow prismatic crystals of 0,3 mm, very rich together with orange red long prismatic Alacranite crystals on Scoria matrix; MM 19,00; KS 28,00 |
I offer an extensive assessment and analysis service. I´ve own modern REM-EDX technology available, please ask for more details.
the prices relate directly to the expense of acquiring the specimens and the work (cleaning, testing, etc.) done on them. All prices include the current 7% VAT on minerals.
I give a discount with large orders only.
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Inside Germany the postage costs € 5.50; for orders of € 150 and over, I prepay shipping. Within the EU shipping costs € 8,50; shipping is free on orders over € 250. Outside the EU shipping for under 1 kg is € 8,50. For over 1 kg costs at least € 25.50 (depending on weight and the respective postal rates). All parcels are insured.
xx = crystals
(xx)= partial or intergrown crystals
X or x = single crystal
Capsel (capsule) = 0.1 to 0.5 cm
MM = micromount approx. 0.5 to 1.0 cm
KS = small piece approx. 1.5 to 4 cm;
NS = average-sized piece approx. 4 to 7 cm
HS = hand-sized piece 7 to 10 cm;
GS / MS = museum-sized pieces larger than 10 cm
xls = crystals; (xls) = partial or intergrown crystals; xl = single crystal.
Capsule= 0.1 to 0.5 cm; MM = micromounts approx. 0.5 to 1.5 cm; KS = small piece approx. 1.5 to 4 cm.
NS = average-sized piece approx. 4 to 7 cm; HS = hand-sized piece 7 to 10 cm; GS / MS = museum-sized pieces larger than 10 cm.