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Minerals

6323 results

Mineral

Boromullite

boromullite

Formula
Al9BSi2O19
Boromuscovite, Lepidolite Locality: Little Three Mine (Little 3), Ramona District, San Diego County, California, USA (Locality at mindat.org) Size: small cabinet, 10 x 8 x 7 cm Lepidolite with Boromuscovite (boron-rich NEW SPECIES) A really fine and attractive lepidolite crystal cluster from anywhere, but especially from San Diego County. This is not just an aside or an association of muscovite here, but rather the new species boromuscovite is present in abundance here as the white earthy stuff. It's a nice example, very rich. The large Lepidolite crystals in middle are 5 cm wide, and have a beautiful metallic lustre, almost a lavender color to them. These specimens came out of one pocket in the 1976 "New Spaulding pocket" and were extensively studied by Gene Foord, for their unusual chemistry. Recently, this muscovite variant has been formally accepted as a new species (thanks to Dr. Robert Lauf for clarifying this for me). Ex. Chuck Houser and Chris Korpi Collections. Mineral

Boromuscovite

boromuscovite

Formula
KAl2(BSi3O10)(OH)2
Brassy inclusions of the extremely rare Pd-Sb-Te mineral borovskite in pyrrothite from the TL in Karelia, Russia (Khautovaara, Suoyarvi, Karelia Republic, Russian Federation), and only one of the few known localities worldwide. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Borovskite

borovskite

Formula
Pd3SbTe4
Mineral

Bortnikovite

bortnikovite

Formula
Pd4Cu3Zn
Mineral

Bortolanite

bortolanite
Mineral

Borzęckiite

borzęckiite

Formula
Pb(UO2)3(SeO3)2O2·3H2O
Mineral

Boscardinite

boscardinite

Formula
TlPb4(Sb7As2)S18
Outstanding reddish brown cryatals of then very rare mineral bosiite from Piedmont, Italy (Valletta Mine, Aisone, Cuneo Province, Piedmont, Italy). Ex. Erich Laskowski collection (USA). Mineral

Bosiite

bosiite

Formula
NaFe³⁺3(Al4Mg2)(Si6O18)(BO3)3(OH)3O
Mohs
7
White crystals of the rare silica-hydrocarbon minerals chibaite (IMA 2008-067) and bosoite (IMA 2014-023) from the type and only known locality worldwide for both species: Arakawa, Minamiboso City, Chiba Prefecture, Honshu Island, Japan. Chibaite and bosoite can't be visually differentiated. Natural analogues of synthetic clathrate MTN with hydrocarbon molecules such as methane, ethane, propane, and 2-methyl-propane contained in its cage-like voids. Chibaite and bosoite are also described as a clathrasils. Ex Alfredo Petrov specimen. Mineral

Bosoite

bosoite

Formula
SiO2·nCₓH2ₓ+2
Mineral

Bostwickite

bostwickite

Formula
CaMn6Si3O16·7H2O
Botallackite Locality: Cligga Head, Perranzabuloe, St Agnes District, Cornwall, England, UK (Locality at mindat.org) Size: cabinet, 10.5 x 7.0 x 3.8 cm Botallackite A superb specimen from the recent find of late 2006 here, with sharp, metallic, unbelieveably intensely colored crystals spread over a large matrix. This is one of the best I have seen for sale from this surprising find. It is notable for the sharp separation and best metallic lustre of the individualized crystals. Mineral

Botallackite

botallackite

Formula
Cu2Cl(OH)3
Botryogen, Knoxville, CA/USA. Mineralogisches Museum Bonn Mineral

Botryogen

botryogen

Formula
MgFe³⁺(SO4)2(OH)·7H2O
Bottinoite Locality: Dörnberg Mine, Ramsbeck, Meschede, Sauerland, North Rhine-Westphalia, Germany Field of view 4 mm. Specimen and photo Leon Hupperichs. Mineral

Bottinoite

bottinoite

Formula
NiSb⁵⁺2(OH)12·6H2O
Mohs
3
Mineral

Botuobinskite

botuobinskite
Mineral

Bouazzerite

bouazzerite

Formula
Bi6(Mg,Co)11Fe14(AsO4)18O12(OH)4·86H2O
Boulangerite Locality: Noche Buena Mine, Noche Buena, Municipio de Mazapil, Zacatecas, Mexico (Locality at mindat.org) Size: cabinet, 12.5 x 6.5 x 6.2 cm Boulangerite This limestone matrix is covered by a matted, felted mass of acicular, lustrous, gray, boulangerite: a lead, antimony, sulfosalt, in crystals, to 1.75 cm across. Cubes of mirror-bright pyrite, to .5 cm across, also dot the matrix. This is an excellent example of the acicular crystal habit of boulangerite, well known historically from Zacatecas. Mineral

Boulangerite

boulangerite

Formula
Pb5Sb4S11
Mohs
2.75
Mineral

Bounahasite

bounahasite
Bournonite From Viboras Mine, Machacamarca, Machacamarca District, Cornelio Saavedra Province, Potosí Department, Bolivia Dimensions: 95 mm x 74 mm x 46 mm Largest Crystal Size: 29 mm Weight: 335 g Specimen with about a dozen sharp and lustrous, well defined, gunmetal color bournonite crystals, showing the classic stepped habit of the species, accompanied by a number of pyrite microcrystals scattered on the matrix. Overall size: 95 mm x 74 mm x 46 mm. Widest crystal: 29 mm; thickest crystal: 12 mm. Weight: 335 g. Undamaged. From a new pocket found in September 2012. Mineral

Bournonite

bournonite

Formula
CuPbSbS3
Mohs
3
Pink crystal aggregates of the very rare ammonium Mg sulphate mineral boussingaultite from a little known locality in Ventura Co., California (South Mountain, Santa Paula, Ventura County, California, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Boussingaultite

boussingaultite

Formula
(NH4)2Mg(SO4)2·6H2O
Mineral

Bouškaite

bouškaite
Cylindrical polished section of a nugget of the extremely rare rhodium mineral bowieite in a completely analyzed specimen by SEM/EDS. Carbon and oxygen in the analysis are due to O2 / CO2 impurities in the vacuum chamber where the spectrum is performed. Percent values of PGM metals are approximate, not exact. From: Salmon River, Goodnews Bay, Bethel Borough, Alaska, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Bowieite

bowieite
Mineral

Bowlesite

bowlesite
White microcrystals similar to efflorescenses of this very rare Zn-Mg sulphate mineral boyleite from the type locality in Germany (Porphyry Quarry, Dossenheim, Rhein-Neckar, Karlsruhe, Baden-Württemberg, Germany), in a dark contrasting matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Boyleite

boyleite
Mineral

Brabantite

brabantite