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Beryl (variety emerald), Biotite
Carnaíba mining district, Campo Formoso ultramafic complex, Pindobaçu, Centro-Norte Baiano, Bahia, Northeast Region, Brazil
54 x 40 mm (Author: Sante Celiberti)Beryl (variety emerald), Biotite
Carnaíba mining district, Campo Formoso ultramafic complex, Pindobaçu, Centro-Norte Baiano, Bahia, Northeast Region, Bra -
Beryl (variety emerald), Biotite
Carnaíba mining district, Campo Formoso ultramafic complex, Pindobaçu, Centro-Norte Baiano, Bahia, Northeast Region, Brazil
54 x 40 mm (Author: Sante Celiberti)Beryl (variety emerald), Biotite
Carnaíba mining district, Campo Formoso ultramafic complex, Pindobaçu, Centro-Norte Baiano, Bahia, Northeast Region, Bra -
Biotite
Bear Lake diggings, Tory Hill, Halliburton Co., Ontario, Canada
6.5 x 7.4 cm.
Part of a medium sized book of biotite collected on 7-20-99. (Author: crosstimber)
Biotite Bear Lake diggings, Tory H
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Biotite
Lagno Amendolare, Sant’Anastasia, Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
1.45 mm bi colored Biotite crystal with Phillipsite (Author: Matteo_Chinellato)
Biotite Lagno Amendolare, Sant&rsq
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Biotite
Silver Crater Mine, Faraday Township, Hastings Co., Ontario, Canada
5.7 x 6.9 cm.
Pseudohexagonal crystal of black biotite. Collected in 1962 when it went by the name lepidomelane. (Author: crosstimber)
Biotite Silver Crater Mine, Farada
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Biotite on Calcite
Arandis, Swakopmund District, Erongo Region, Namibia
8,0 x 6,5 x 10,0 cm (Author: MIM Museum)Biotite on Calcite
Arandis, Sw -
Biotite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm (Author: Doug)
Biotite
Poudrette quarry -
Biotite
Monzoni Mountains, Fassa Valley, Trento Province, Trentino-Alto Adige (Trentino-Südtirol), Italy
70,6 x 61 mm (Author: Sante Celiberti)Biotite
Monzoni Mountains, Fas -
Corundum var. ruby
Zazafatsy Commune, Ihosy Dist., Fianarantsoa Province, Madagascar
3.9 x 4.3 cm
A hexagonal bi-colored corundum crystal showing reddish and purple
tones, surrounded by white feldspar and embedded in a black biotite schist. (Author: crosstimber)
Corundum var. ruby Zazafatsy Commu
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm
Fuzzy crystal, sorry! (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm
Fuzzy crystal, sorry! (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Corundum, biotite
Zazafotsy Quarry, Zazafotsy, Ihosy, Horombe, Fianarantsoa, Madagascar
60 mm x 50 mm (Author: Carles Millan)
Corundum, biotite Zazafotsy Quarry
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Emeralds in Biotite Schist.
Cobra Pit, Gravelotte Emerald Mine, Limpopo Province, S. Africa
2.7 x 2.3 x 2.5cm
Crystals to 1.6cm (Author: Debbie Woolf)
Emeralds in Bioti
Cobra Pit, Gravel -
Emeralds in Biotite Schist.
Cobra Pit, Gravelotte Emerald Mine, Limpopo Province, S. Africa
2.7 x 2.3 x 2.5cm
Crystals to 1.6cm (Author: Debbie Woolf)
Emeralds in Bioti
Cobra Pit, Gravel -
Fergusonite-(Y), Feldspar Biotite
Ytterby, Vaxholm, Sweden
FoV: 4 x 4 cm
One more ugly mineral that nevertheless is exciting.
First the exotic formula, it is a niobate of yttrium (YNbO4)
Then the locality is hardcore: It is a historical Swedish quarry that has delivered material for the discovery of 10 different rare earth elements - four of which have names derived directly from the place itself: Yttrium, Terbium, Erbium, Ytterbium
about the site: http://www.mindat.org/loc-3191.html (Author: kakov)
Fergusonite-(Y), Feldspar Biotite
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Mica var Biotite
Bear Lake Diggings, Gooderham, Haliburton County, Ontario, Canada
8.7 x 8.0 cm (Author: Don Lum)
Mica var Biotite Bear Lake Digging
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Molybdenite, Biotite, Feldspar
100 mm X 85 mm X 85
(Author: Robert Seitz)
Molybdenite, Biotite, Feldspar
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Molybdenite, Biotite, Feldspar
Khoroshiv (Volodarsk-Volynskii), Zhytomyr Oblast, Ukraine
100 mm X 85 mm X 85 mm (Author: Robert Seitz)Molybdenite, Biotite, Feldspar
Khoroshiv (Volodarsk-Volynskii), Zhytomyr Oblast, Ukrain -
Pericline & Biotite
La Fibbia. St Gotthard. Switzerland
FOV 3.99cm
0,52x. Focus rail MacroRail. Canon EOS 600D. Ikea lights
Photo: Oscar Fernández Arcís, Mineral: Manuel de Torres (Author: ofarcis)
Pericline & Biotite La Fibbia.
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Pyrochlore Group
Vishnevye Mts, Chelyabinsk Oblast, Southern Urals, Russia
8.5 x 10.8 cm
Lustrous pyrochlore crystals to 0.6 cm showing reddish-brown color in transmitted light. The crystals are sharp octahedrons with cubic modifications and are associated
with black biotite on a white calcite matrix. (Author: crosstimber)
Pyrochlore Group Vishnevye Mts, Ch
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Sodalite
Princess Quarry, Dungannon Township, Hastings Co., Ontario, Canada
7.0 x 7.8 cm
Massive blue sodalite associated with yellow cancrinite and small grains of black biotite. (Author: crosstimber)
Sodalite Princess Quarry, Dunganno
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Topaz, Smoky Quartz, Biotite, Feldspar
Diamond Rocks, Mourne Mountains, Co Down, Northern Ireland.
Topaz approx 10 mm (Author: nurbo)
Topaz, Smoky Quartz, Biotite, Feld
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Very old sample with dark brown biotite crystal (4 cm) from Ormont, Eifel mountains, Rhineland-Palatinate. About 1930. (Author: Andreas Gerstenberg)
Very old sample with dark brown bi
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Zircon on Biotite
Seiland Island, Alta, Finnmark, Norway
8.5 x 8.0 x 6.0 cm (Author: MIM Museum)Zircon on Biotite
Seiland Isla -
Zircon on Biotite
Store Kufjord, Seiland Island, Alta, Finnmark, Norway
9,5 x 6,5 x 7,5 cm (Author: MIM Museum)Zircon on Biotite
Store Kufjor -
Zircon with Nepheline and Biotite (Group)
Gridone - Monte Limidario area, Centovalli, Locarno District, Ticino (Tessin), Switzerland
7.5 x 6.5 x 3.5 cm / main crystal: 3.2 cm (Author: MIM Museum)Zircon with Nepheline and Biotite (Group)
Gridone - Monte Limidario area, Centovalli, Locarno District, Ticino (Tessin),
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