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Bandylite Locality: Queténa Mine, Toki Cu deposit, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile (Locality at mindat.org) Size: 11.9 x 7.0 x 5.0 cm. This matrix, stained by multi-colored copper hues, is host to two dark green patches of finely microcrystallized bandylite, a rare copper, boron, hydroxide, chloride. Note also the patches of lighter blue to the right side of the specimen as shown atop: The larger area of bandylite measures over 2.0 cm across. Ex. Philadelphia Academy of Natural Sciences. Mineral

Bandylite

bandylite

Formula
Cu[B(OH)4]Cl
Mohs
2.5
A very small specimen of the very rare Na-K-V oxide mineral bannermanite from the type locality in Izalco volcano, El Salvador, where it is extremely rare. Analyzed spciemen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Bannermanite

bannermanite
Bannisterite, Bustamit Locality: North Mine (North Broken Hill Mine; NBH Mine), Broken Hill, Yancowinna County, New South Wales, Australia Original description: A 2.5 by 1.7 cms specimen of black crystals with brown Bustamite. Mineral

Bannisterite

bannisterite

Formula
(Ca,K,Na)(Mn²⁺,Fe²⁺)10(Si,Al)16O38(OH)8 * nH2O
Mohs
4
Baotite Locality: Sheep Creek, Mineral Point District, Ravalli County, Montana, USA (Locality on mindat.org) Size: 1.5 cm x 1.0 cm x 0.75 cm Two very nice, vitreous, vertically striated, blackish brown crystal fragments; one 7mm and the other 11mm in maximum dimension. This is an excellent example of this rare barium-titanium-niobium cyclosilicate. The label, from A. L. McGuiness, indicates aeschynite (?) in association. Ex. Rock Currier collection. Tom and Melissa Campbell photos. Mineral

Baotite

baotite

Formula
Ba4Ti8Si4O28Cl
Mohs
6
Barahonaite-(Al) Locality: Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain (Locality at mindat.org) Picture width 0,4 mm. Collection and photograph Christian Rewitzer Mineral

Barahonaite-(Al)

barahonaite-(Al)

Formula
(Ca,Cu,Na,Fe³⁺,Al)12Al2(AsO4)8(OH,Cl)x * nH2O
Barahonaite-(Fe) Locality: Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain (Locality at mindat.org) Picture width 0,6 mm. Collection and photograph Christian Rewitzer Mineral

Barahonaite-(Fe)

barahonaite-(Fe)

Formula
(Ca,Cu,Na,Fe³⁺,Al)12Fe³⁺2(AsO4)8(OH,Cl)x * nH2O
Pale pink yellowish crystals of the very rare ammonium silicofluoride mineral bararite from one of the few known localities worldwide (Shamokin, Northumberland County, Pennsylvania, United States of America). Mineral

Bararite

bararite

Formula
(NH4)2SiF6
:Almost all of the light areas fluoresce either very bright light blue or a somewhat less intense creamy blue-white. (See the UV + ambient light child photo for more on this.) Under the scope, I initially thought there might be two different fluorescing minerals. But upon further examination/reflection, I think that only the baratovite is fluorescing. There is another platy, transparent, mineral present (albite ?), but it does not fluoresce. The baratovite appears platy pink with some yellowish or greenish areas. But all of it has a "cracked glaze" appearance that reminds me of vuonemmite or epistolite - the plates are fairly thick. Updated May 2014 with a new full res photo showing the "crackly" appearance more clearly. The original photo remains as a stereo pair, but I have added a new UV + ambient light child photo. Via D. Haldeman. MOB photos. From: Dara-i-Pioz Glacier, Alai Range, Tien Shan Mtn, Region of Republican Subordination, Tajikistan Mineral

Baratovite

baratovite

Formula
KCa7(Ti,Zr)2Li3Si12O36F2
Barberiite (Picture size 1 mm) Fundort: Vulcano, Lipari Islands, Italy. Colourless tabular crystals of barberiite. Collection and foto Thomas Witzke. Mineral

Barberiite

barberiite

Formula
NH4BF4
Phosphosiderite, Barbosalite Locality: Bull Moose Mine, Custer, Custer District, Custer County, South Dakota, USA (Locality at mindat.org) Size: 5.0 x 4.0 x 3.5 cm. Sharp, gemmy, transparent crystals of the rare species phosphosiderite, to 1 mm or so, perched on 3-dimensional dark phosphate matrix with black microcrystals of barbosalite. From old finds here (ex. Dr. David Garske). Mineral

Barbosalite

barbosalite

Formula
Fe²⁺Fe³⁺2(PO4)2(OH)2
Mohs
6
Mineral

Barentsite

barentsite

Formula
Na7Al(HCO3)2(CO3)2F4
Dark green almost black crystals of the very rare vanadium mineral bariandite from the type locality in Mounana (Mounana Mine, Franceville, Haut-Ogooue, Gabon). Bariandite has only been found in 5 localities worldwide. Mineral

Bariandite

bariandite

Formula
Al0.6(V5+,V4+)8O20 * 9H2O
Mineral

Barikaite

barikaite

Formula
Ag3Pb10(Sb8As11)Σ19S40
Green crystal aggregates of bario-olgite from Kola peninsula (Palitra Pegmatite, Karnasurt Mine, Kedykverpakhk Mountain, Murmansk Oblast, Russian Federation). Ex. Excalibur Mineral Company specimen. Ex. Erich Laskowski collection (USA). Mineral

Bario-Olgite

bario-olgite

Formula
Na(Na,Sr,Ce)2Ba(PO4)2
Mineral

Bario-Orthojoaquinite

bario-orthojoaquinite

Formula
(Ba,Sr)4Fe2Ti2[Si4O12]2O2 * H2O
Figure 3. (a) BSE image of a qeltite crystal. (b–c) Optical images of the same qeltite crystal showing pleochroism changing from light brown (~ ‖ Z) to dark brown with a red hue (~⊥ Z). Key: Baf – barioferrite; Fap – fluorapatite; Gh – gehlenite; Qlt – qeltite; Rnk – rankinite. The abbreviations are after Warr (Reference Warr2021). The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Mineral

Barioferrite

barioferrite

Formula
BaFe³⁺12O19
Mineral

Bariolakargiite

bariolakargiite

Formula
BaZrO3
Mineral

Barioperovskite

barioperovskite

Formula
BaTiO3
Mineral

Bariopharmacoalumite

bariopharmacoalumite

Formula
Ba0.5Al4(AsO4)3(OH)4·4H2O
Bariopharmacosiderite, Scorodite, Alunite Supergroup (Field of view 2 mm) Locality: Les Montmins Mine (Ste Barbe vein), Échassières, Ébreuil, Allier, Auvergne, France Original description: Bariopharmacosiderite (red), Scorodite (blue to colorless), on Alunite group (yellow). Photo and collection Queneau Patrice. Mineral

Bariopharmacosiderite

bariopharmacosiderite

Formula
Ba0.5Fe³⁺4(AsO4)3(OH)4 * 5H2O
Bariosincosite, minyulite and metavariscite in shale. Corta Azcárate, Eugui, Esteribar (Navarra), Spain Mineral

Bariosincosite

bariosincosite

Formula
Ba(VO)2(PO4)2 · 4H2O
Baricite Locality: Rapid Creek, Dawson Mining District, Yukon Territory, Canada (Locality at mindat.org) This is a very rich specimen of this rare phosphate, only seldom seen even at these rich phosphate localities in the remote Yukon. The specimen features lustrous, metallic crystals of a slightly blue-gray color , arranged in plates one atop the other. It is a very rich, extremely showy example of this species. The phosphate deposits of the Yukon are one of the world's great sources of a suite of rare phosphate species, and the Ordway collection was known for them over the years. Self-collected by Al Ordway in the 1970s. It was long in his display collection and comes with a custom label to that effect. 7.1 x 6.6 x 2.3 cm Mineral

Barićite

barićite

Formula
(Mg,Fe)3(PO4)2·8H2O
Mineral

Barkovite

barkovite

Formula
Ni1,5Sn
Mineral

Barlowite

barlowite

Formula
Cu4BrF(OH)6