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Brendelite: (Bi,Pb)2Fe(PO4)(O,OH)3
Comments: Small brown tabular crystals of brendelite on matrix. Location: Güldener Falk Mine, Schneeberg, Erzgebirge, Sachsen, Germany. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Brenkite: Ca2(CO3)F2
Comments: Spherical aggregate of colorless crystals of brenkite. Location: Schellkopf, Brenk, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 7.5 mm. © Thomas Witzke / Abraxas-Verlag
Brianyoungite: Zn3(CO3,SO4)(OH)4
Comments: Silky white aggregates of brianyoungite with small yellow crystals of sulfur on sphalerite. Location: St Johannes Mine, Wolkenstein, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag
Bukovskyite: Fe+++2(AsO4)(SO4)(OH)·7(H2O) Zykaite: Fe+++4(AsO4)3(SO4)(OH)·15(H2O)
Comments: Pale beige acicular crystals of bukovskýite with white zykaite. Location: Christbescherung Mine, Großvoigtsberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Bunsenite: NiO
Comments: Greenish earthy bunsenite. Location: Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Buryatite: Ca3(Si,Fe+++,Al)[SO4][B(OH)4](OH,O)6·12(H2O)
Comments: Vitreous colorless buryatite on matrix. Location: Solongo B deposit, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 6 mm. © Thomas Witzke / Abraxas-Verlag
Buttgenbachite: Cu19Cl4(NO3)2(OH)32·2(H2O)
Comments: A blue crystal of buttgenbachite. Location: Likasi Mine, Likasi, Shaba (Katanga), Congo (Zaïre). Scale: Crystal length 3.1 mm. © Thomas Witzke / Abraxas-Verlag
Bystrite: (Na,K)7Ca(Si6Al6)O24S4.5·(H2O) Lazulite: MgAl2(PO4)2(OH)2
Comments: Brownish-yellow bystrite grains with blue lazulite in an igneous rock. Location: Malo-Bystrinskoye lazurite deposit, Tunka Valley, Sludyanka, Lake Baikal Region, Russia. Scale: Picture size 7 mm. © Thomas Witzke / Abraxas-Verlag
Cabalzarite: Ca(Mg,Al,Fe++)2(AsO4)2(H2O,OH)2
Comments: Brownish crystals of cabalzarite on matrix. Location: Falotta, Tinizong (Tinzen), Sursass (Oberhalbstein), Grischun (Grisons; Graubünden), Switzerland. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Calcurmolite: Ca(UO2)3(MoO4)3(OH)2·11(H2O)
Comments: Calcurmolite in yellow globular aggregates of radiating fibers. Location: Rabejac, Lodeve, Herault, France. Scale: Picture size 7 mm. © Thomas Witzke / Abraxas-Verlag
Callaghanite: Cu2Mg2(CO3)(OH)6·2(H2O)
Comments: Blue crystals of callaghanite on matrix. Location: Gabbs, Nevada, USA. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Calomel: Hg2Cl2
Comments: A grayish aggregate of calomel on a rufous matrix. Location: Landsberg (Moschellandsberg), Obermoschel, Palatinate, Rhineland-Palatinate, Germany. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag
Camerolaite: Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O)
Comments: Blue spherical aggregates of camerolaite on matrix. Location: Lubietová (Libethen), Banská Bystrica (Neusohl), Banskobystricky Kraj, Slovak Republic. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Canavesite: Mg2(CO3)(HBO3)·5(H2O)
Comments: White acicular crystals of canavesite on matrix. Location: Brosso Mine, Ivrea, Piedmont, Italy. Scale: Picture size 9 mm. © Thomas Witzke / Abraxas-Verlag
Caoxite: Ca(C2O4)·3(H2O)
Comments: Colorless to white crystals of caoxite on matrix. Location: Cerchiara Mine, Faggiona, Vara valley, La Spezia province, Liguria, Italy. Scale: Picture size 1.2 mm. © Thomas Witzke / Abraxas-Verlag
Capgaronnite: HgAg(Cl,Br,I)S
Comments: Very small black prismatic crystals of capgaronnite in matrix. Location: Cap Garonne, Var, France. Scale: Picture size 0.7 mm. © Thomas Witzke / Abraxas-Verlag
Carbocernaite: (Ca,Na)(Sr,Ce,Ba)(CO3)2
Comments: Light brownish massive carbocernaite. Location: Olenii (Oleny) Ruchei Stream apatite deposit, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Caresite: Fe++4Al2(OH)12CO3·3(H2O)
Comments: Tabular brownish-yellow crystals of caresite in matrix. Location: Poudrette quarry, Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 2.5 mm. © Thomas Witzke / Abraxas-Verlag
Carlhintzeite: Ca2AlF7·(H2O)
Comments: Colorless tabular crystals of carlhintzeite on matrix. Location: Hagendorf, Bayern, Germany. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Carlsbergite: CrN Kamacite: alpha-(Fe,Ni)
Comments: Polished section showing a small light gray elongated inclusion of carlsbergite in massive kamacite. Location: Kenton County meteorite, Kenton Co., Kentucky, USA. Scale: Picture size 0.08 mm. © Thomas Witzke / Abraxas-Verlag