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wardsci.com 800-962-2660 Sphalerite (ZnFe) S Crystallography: Isometric; 43m. Crystals usually tetrahedral or dodecahedral and often distorted and complex; rough curved faces common. Usually in cleavable masses coarse to fine granular. Physical Pr...

+ward’ssciencewardsci.com800-962-2660 Azurite Cu3 (CO3)2 (OH)2 Crystallography: Monoclinic; 2/m. Habit varies; crystals commonly complex and malformed. Also massive. Physical Properties: Cleavage: {011} perfect {100} fair. Fracture conchoidal brit...

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wardsci.com 800-962-2660 Illite (K H3O) (Al Mg Fe)2 (Si Al)4 O10 [(OH)2 H2O] Crystallography: Monoclinic. Crystals not distinguishable; usually in clay-like masses either compact or friable. Physical Properties: Cleavage: {001} perfect but not obs...

+ward’ssciencewardsci.com800-962-2660 Copper Cu Crystallography: Isometric; 4/m32/m. Tetrahexahedron faces are common as are the cube dodecahedron and octahedron. Crystals usually malformed and branching; also irregular masses and wire-like forms....

wardsci.com 800-962-2660 Montmorillonite (NaCa)0.3 (Al Mg)2 Si4 O10 (OH)2 • nH2O Crystallography: Monoclinic. Always in earthy masses; crystals not distinguishable. Physical Properties: Cleavage: None apparent; usually unctuous and plastic. Hardne...

wardsci.com 800-962-2660 Chromite Fe+2 Cr2 O4 (Spinel Group) Crystallography: Isometric; 4/m32/m. Habit octahedral but crystals small and rare; most often granular to compact; massive. Physical Properties: Cleavage: None. Fracture uneven; brittle....

+ward’ssciencewardsci.com800-962-2660 Goethite Fe+3 O (OH) (See also Limonite) Crystallography: Orthorhombic; 2/m2/m2/m. Acicular or rarely in distinct prismatic vertically striated crystals. Also massive reniform stalactitic or in radiating fibro...

+ward’ssciencewardsci.com800-962-2660 Beryl Be3 Al2 Si6 O18 Crystallography: Hexagonal; 6/m2/m2/m. Strong prismatic habit; frequently vertically striated and grooved. Forms usually present consist only of {1010} and {0001}. Physical Properties: Cl...

wardsci.com 800-962-2660 Bytownite (CaNa) Al (AlSi) Si2O8 (An70-90) (Feldspar) Crystallography: Triclinic; 1. Crystals usually tabular parallel to {010}; twinning frequent as in albite. Commonly as irregular grains and cleavable masses. Physical P...

+ward’ssciencewardsci.com800-962-2660 Sulfur S Crystallography: Orthorhombic; 2/m2/m2/m. Crystals commonly dipyramidal; thick tabular on {001.} Also massive in spherical or reniform shapes incrusting earthy. Physical Properties: Cleavage: None. Fr...

wardsci.com 800-962-2660 Talc Mg3 Si4 O10 (OH)2 Crystallography: Monoclinic; 2/m. Rarely in crystals; more often in foliated masses or compact fine- grained aggregates. Compact and massive varieties known as steatite or soapstone. Physical Propert...

+ward’ssciencewardsci.com800-962-2660 Cinnabar HgS Crystallography: Hexagonal-R; 32 (low temperature form). Crystals usually rhombohedral often in penetration twins. Commonly fine granular massive; also earthy. Physical Properties: Cleavage: {1010...

+ward’ssciencewardsci.com800-962-2660 Labradorite (CaNa) Al (AlSi) Si2O8 (An30-70) (Feldspar Group) (see also Plagioclase) Crystallography: Triclinic; 1. Crystals usually tabular parallel to {010}; twinning frequent as in albite. Commonly in irreg...

+ward’ssciencewardsci.com800-962-2660 Oligoclase (NaCa) Al (AlSi) Si2O8 (An10-30) (Feldspar Group) (see also Plagioclase) Crystallography: Triclinic; 1. Crystals usually tabular parallel to {010}; twinning frequent as in albite. Commonly as irregu...

+ward’ssciencewardsci.com800-962-2660 Albite NaAlSi3O8 (An0-10) (Feldspar Group) (see also Plagioclase) Crystallography: Triclinic; 1. Crystals commonly tabular parallel to {010}; sometimes elongated on b. Twinning and striations common. Often as ...