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Afghanite: (Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3·(H2O)
Comments: Parallel grouping of three, terminated, blue, opaque afghanite crystals set in matrix. Location: Sar-eSang, Badakhshan, Afghanistan. Scale: Crystal size 3 cm. © Dan Weinrich
Comments: Stubby hexagonal dark blue afghanite crystal to 2cm set in sulfide rich marble. The dark blue color is just a thin veneer on a pale-blue crystal. Location: Rabot, Sar-e-Sang Dist., Badakshan, Afghanistan. Scale: Overall: 5 x 2 x 4 cm. © Tom Loomis / Dakota Matrix