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Heterogenite-3R: Co+++O(OH)
Comments: Black, botryodal heterogenite with green chrysocolla. Location: Star of the Congo Mine, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre). Scale: Specimen Size 11.6 x 9.9 x 5.6cm. © Rob Lavinsky
Keyite: Cu++3(Zn,Cu)4Cd2(AsO4)6·2(H2O)
Comments: Brilliant blue keyite crystals on a matrix of white, metallic suflide-arsenide ore. Location: Tsumeb, Namibia. Scale: 0.9 x 0.7 x 0.7 cm. © Rob Lavinsky
Lawsonbauerite: (Mn,Mg)9Zn4(SO4)2(OH)22·8(H2O)
Comments: Brown, bladed coating of lawsonbauerite crystals on white calcite. Location: Sterling Hill, Ogdensburg, Sussex Co., New Jersey, USA. Scale: Specimen Size 8 x 7 x 4 cm. © Rob Lavinsky
Milarite: K2Ca4Al2Be4Si24O60·(H2O)
Comments: Blocky, barrel-shaped crystal of milarite on muscovite.. Location: Jagauaracu, Minas Gerais, Brazil. Scale: Crystal size 2.5 x 1 x 1 cm. © Rob Lavinsky
Mimetite: Pb5(AsO4)3Cl Wulfenite: PbMoO4
Comments: Gemmy, pale yellow mimetite crystal with brownish-orange wulfenite. Former James and Dawn Minette Collection. Location: Gem Pocket 1971, Tsumeb, Namibia. Scale: 2 x 1 x 1 cm. © Rob Lavinsky
Moschellandsbergite: Ag2Hg3
Comments: Moschellandsbergite 4mm crystal on matrix. Location: Carolina Mine, Moschellandsberg, Obermoschel, Rhineland-Palatinate, Germany. Scale: Specimen Size 6.0 x 4.8 x 4.0 cm. © Rob Lavinsky
Mroseite: CaTe++++(CO3)O2
Comments: White, flaky patches of mroseite in complex ore matrix. Location: Bambolla Mine, Moctezuma, Sonora, Mexico. Scale: Not Given. © Rob Lavinsky
Natrophilite: NaMnPO4
Comments: Natrophilite with lithiophilite. Location: Abija N. Fillow Quarry (Branchville Quarry), Branchville, Redding, Fairfield Co., Connecticut, USA. Scale: Specimen Size 3.7 x 2.2 x 1.9 cm. © Rob Lavinsky
Ottensite: Na3(Sb2O3)3(SbS3)·3H2O
Comments: Red-brown crusts of ottensite on stibnite. Location: Qinglong (Dachang) Sb-Au deposit, Qinglong Co., Qianxi'nan Autonomous Prefecture, Guizhou Province, China. Scale: Specimen size 5.2 x 3.0 x 2.9 cm. © Rob Lavinsky
Picromerite: K2Mg(SO4)2·6(H2O)
Comments: Blocky white picromerite crystals on reddish halite. Location: Heringen, Werra Valley, North Hesse, Hesse, Germany. Scale: Specimen Size 5.5 x 4.7 x 3.4 cm. © Rob Lavinsky