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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
Alamosite: PbSiO3
Comments: White alamosite crystal group. John Schneider Collection. Location: Tsumeb, Namibia. Scale: 3.5x3x2 cm. © Dan Weinrich
Albite: NaAlSi3O8 Plagioclase: (Na,Ca)(Si,Al)4O8
Comments: Colorless, lustrous blocky albite crystals to 3 cm in size with a thick dusting of micaceous green micro chlorite. Location: Acushnet Quarry, Bristol Co., Massachussetts, USA. Scale: 17 x 15 x 7.5 cm matrix. © Dan Weinrich
Apatite-(CaF): Ca5(PO4)3F Beryl: Be3Al2Si6O18 Muscovite: KAl2(Si3Al)O10(OH,F)2 Apatite: Ca5(PO4)3(OH,F,Cl)
Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. Location: Nagar area, Gilgit district, Northern Areas, Pakistan. Scale: 3 x 3 cm. © Dan Weinrich
Aurichalcite: (Zn,Cu)5(CO3)2(OH)6
Comments: Sky-blue radiating acicular crystals of aurichalcite covering matrix. Location: Lucin, Utah, USA. Scale: 6.5 x 3 x 2 cm with 5 mm crystals. © Dan Weinrich
Bertrandite: Be4Si2O7(OH)2
Comments: Colorless prismatic crystals of bertrandite on matrix with pale pink rhombohedral crystals of rhodochrosite. Location: Yiaoguanshen mine, Hunan Province, China. Scale: 3.5 x 4 cm. © Dan Weinrich
Beryl: Be3Al2Si6O18
Comments: Transparent Aquamarine, the blue variety of beryl. Location: Nagar, Pakistan. Scale: 3 x 4 x 8.5 cm. © Dan Weinrich
Cavansite: Ca(VO)Si4O10·4(H2O)
Comments: Brilliant blue balls of acicular crystals of cavansite to 1 cm in size richly scattered about a matrix of colorless stilbite crystals. Location: Wagholi, Poona district, Maharashtra, India. Scale: 7.5 x 9 x 8 cm. © Dan Weinrich
Celestine: SrSO4
Comments: Transparent blue orthorhombic crystals of celestine, some doubly terminated to 15 mm in size, on a limestone matrix. Location: Clay Center, Ohio, USA. Scale: 5 x 9 x 2.5 cm. © Dan Weinrich
Copper: Cu
Comments: Native copper forming a branching cluster of crystals with some massive calcite. Location: Houghton County, Michigan, USA. Scale: Crystal size 1.5 cm. © Dan Weinrich