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Mineralati

Minerals

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Some white prismatic crystals of the very rare Na borate mineral biringuccite from the TL and only known locality worldwide in Italy for the mineral (Larderello, Pomarance, Pisa Province, Tuscany, Italy) in a completely analyzed specimen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Biringuccite

biringuccite

Formula
Na2B5O8(OH)·H2O
Birnessite (black) or aragonite (white) from the 300' Level, Gold Hill Mine, Clifton District, Tooele County, Utah, USA. Specimen size: 4 cm Mineral

Birnessite

birnessite

Formula
(Na,Ca,K)0.6(Mn⁴⁺,Mn³⁺)2O4·(H2O)1.5
Mohs
1.5
Mineral

Birunite

birunite

Formula
Ca18(SiO3)8.5(CO3)8.5(SO4)·15H2O
Bischofite from Antofagasta, Chile Mineral

Bischofite

bischofite

Formula
MgCl2·6H2O
Bismite. Pen for scale. No locality given. Mineral collection of Brigham Young University Department of Geology, Provo, Utah. Photograph by Andrew Silver. BYU index 4-8051, Bi_2O_3. Mineral

Bismite

bismite

Formula
Bi2O3
Mohs
4.5
Yellow-orange bismoclite on bismuthinite from the Alto do Giz pegmatite, Equador, Rio Grande do Norte, NE-region, Brazil. Minor oxidation can also be seen on the lower-left corner in this image. Approximate size: 20 x 6 x 2 mm. From my personal collection. A more zoomed-in, higher quality image has now been uploaded here: https://commons.wikimedia.org/wiki/File:Bismoclite_(close-up).jpg. Mineral

Bismoclite

bismoclite

Formula
BiOCl
Skeletal crystals of native bismuth in quartz. La Espuela de San Miguel Mine, Villanueva de Córdoba (Córdoba), Spain. Fov 5 cm. Collection and photo Miguel Calvo Mineral

Bismuth (Native)

bismuth (native)

Formula
Bi
Mohs
2.3
Bismuthinite - Schlaggenwald (Horni Slavkov) - Bohemia - Czech Republic (XX 1.1cm) Mineral

Bismuthinite

bismuthinite

Formula
Bi2S3
Mohs
2
Bismutite Locality: Point 14.0, Hohenstein, Reichenbach, Bensheim, Odenwald, Hesse, Germany Yellow acicular crystals of Bismutite. Field of view 5 mm. Specimen and photo Leon Hupperichs. Mineral

Bismutite

bismutite

Formula
Bi2O2(CO3)
Black crystals of the rare mineral bismutocolumbite in a contrasting matrix. From: Malkhan, Krasnyi Chikoy, Zabaykalsky Krai, Russian Federation. Mineral

Bismutocolumbite

bismutocolumbite

Formula
BiNbO4
Yellow patches of the rare bismuth mineral bismutoferrite from the type locality: Pucher Shaft, Erzgebirge, Saxony, Germany. Mineral

Bismutoferrite

bismutoferrite

Formula
Fe³⁺2Bi(SiO4)2(OH)
Bronze yellow crystal aggregates of the rare Ni-Bi mineral bismutohauchecornite from Canada (Vermilion Mine, Denison Township, Sudbury District, Ontario, Canada) in a partially polished for the analysis specimen that was analyzed by SEM/EDS by the former owner of the specimen. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Bismutohauchecornite

bismutohauchecornite

Formula
Ni9Bi2S8
Mineral

Bismutostibiconite

bismutostibiconite

Formula
(Bi,Fe³⁺,☐)2Sb⁵⁺2O7
Yellow crystal aggregates of the rare Bi-Ta mineral bismutotantalite from New Mexico (Harding Mine, Picuris, Taos County, New Mexico, United States of America). Very rich specimen! Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Bismutotantalite

bismutotantalite

Formula
BiTaO4
Mineral

Bitikleite

bitikleite

Formula
Ca3(SbSn)(AlO4)3
Mineral

Bityite

bityite

Formula
LiCaAl2(AlBeSi2O10)(OH)2
Mineral

Bixbyite-(Fe)

bixbyite-(Fe)

Formula
(Fe,Mn2)O3
Bixbyite Locality: N'Chwaning I Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa (Locality at mindat.org) Size: 3.9 x 2.9 x 2.4 cm. This remarkable specimen turned up in a small South African collection and when I showed it to Charlie Key, expert on all things African, his jaw dropped and he said something like "I never thought I'd see another..." He apparently had one from this same pocket, in the early 1980s, and has not had another since. This specimen he ranked very highly, and said they would both be among the best he knew of from the Kalahari fields. By worldwide standards, these would also have to command top spot except for a very few specimens from Utah, and those are of different habit entirely. The lustre and sharpness on these are amazing, they look carved. The large crystal is 1.6 cm, ranking very highly for the species. The sharpness and lustre, though, make this so distinct from Utah material of similar size that I thought at first this must be magnetite and not bixbyite. Charlie also confirmed the locality information. Mineral

Bixbyite-(Mn)

bixbyite-(Mn)

Formula
Mn³⁺2O3
Colour
black
Outstanding for the species dark green crystal aggregates of the very rare phosphate mineral bjarebyite associated to blue burangaite from the TL for the second one: Buranga Pegmatite, Gatumba, Ngororero District, Western Province, Rwanda. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Bjarebyite

bjarebyite

Formula
(Ba,Sr)(Mn²⁺,Fe²⁺,Mg)2Al2(PO4)3(OH)3
Brown crystal aggregates of the very rare Fe tellurite mineral blakeite in a small piece of matrix from the TL in Nevada (Mohawk Mine, Goldfield District, Esmeralda County, Nevada, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Blakeite

blakeite

Formula
Fe³⁺2[Te⁴⁺O3]3 (?)
Yellow crystals of the very rare mineral blatonite from the type locality in Utah (Jomac Mine, San Juan County, Utah, United States of America) and only one of the three known localities worldwide. Associated mineral is magnesiozippeite. Mineral

Blatonite

blatonite

Formula
(UO2)CO3·H2O
Black crystals of the extremely rare mineral blatterite from the type locality and only known locality worldwide: Kittelgruvan, Nordmark, Värmland, Sweden. Blatterite is a antimony manganese borate. Mineral

Blatterite

blatterite

Formula
Sb⁵⁺3Mn³⁺9Mn²⁺35O32(BO3)16
Colour
black
Mineral

Bleasdaleite

bleasdaleite

Formula
(Ca,Fe³⁺)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13
Blixite Field of view: 1 mm Locality: Passa Limani, Lavrion slag localities, Lavreotiki, East Attica, Attica, Greece (locality at mindat.org) Mineral

Blixite

blixite

Formula
Pb2(O,OH)2Cl