You Searched For: Silicate Standards

Andradite Ca3Fe2+3 (SiO4)3 (Garnet Group) Crystallography: Isometric; 4/m32/m. Common forms are dodecahedron and trapezohedron often in combination. Also massive granular. Physical Properties: Cleavage: None; parting sometimes distinct. Fracture s...

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...

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...

Kaolinite Al2 Si2 O5 (OH)4 Crystallography: Triclinic; 1. In very minute thin rhombic or hexagonal plates. More commonly in clay-like masses. Physical Properties: Cleavage: {001} perfect; flexible inelastic. Usually unctuous and plastic. Hardness:...

+ward’ssciencewardsci.com800-962-2660 Diopside CaMg Si2O6 (Pyroxene Group) Crystallography: Monoclinic; 2/m. Crystals prismatic showing square or 8-sided cross section; also granular massive. Physical Properties: Cleavage: {110} at 87° and 93° imp...

wardsci.com 800-962-2660 Topaz Al2SiO4 (FOH)2 Crystallography: Orthorhombic; 2/m2/m2/m. Crystals commonly prismatic with vertical prism faces often striated; also in crystalline masses or granular. Physical Properties: Cleavage: {001} perfect. Fra...

Almandine Fe3+2 Al2 (SiO4)3 (Garnet Group) Crystallography: Isometric; 4/m32/m. common forms are dodecahedron and trapezohedron. Also massive granular. Physical Properties: Cleavage: Not prominent; {110} parting sometimes distinct. Fracture subcon...

+ward’ssciencewardsci.com800-962-2660 Pumice Type: Igneous; extrusive (pyroclastic). Texture/Appearance: Glassy vesicular foamy frothy. Very light-weight with numerous vacuoles (some varieties float in water). A natural glass froth in which the vo...

+ward’ssciencewardsci.com800-962-2660 Sodalite Na8 Al6 Si6 O24 Cl2 Crystallography: Isometric; 43m. Crystals rare usually dodecahedrons. More commonly massive granular. Physical Properties: Cleavage: {011} poor. Fracture conchoidal to uneven; brit...

+ward’ssciencewardsci.com800-962-2660 Skarn Type: Metamorphic; contact. Texture/Appearance: Most often coarse-grained and granoblastic with no foliation. Massive structure with zones of mineral concentration. Color: Varies with mineralogy but usua...

wardsci.com 800-962-2660 Granite Type: Igneous intrusive. Texture/Appearance: Massive medium to coarse-grained; holocrystalline sometimes porphyritic. Color: White light gray pink or red. Mineralogy/Chemistry: Felsic; composed primarily of quartz ...

+ward’ssciencewardsci.com800-962-2660 Diorite Type: Igneous; intrusive. Texture/Appearance: Massive generally medium-to-coarse grained; subhedral equigranular to por- phyritic. Differences in color and grain size are common with orbicular structur...

+ward’ssciencewardsci.com800-962-2660 Nepheline (NaK) AlSiO4 Crystallography: Hexagonal; 6. Rarely in small prismatic crystals with base; more commonly massive compact and in embedded grains. Physical Properties: Cleavage: {1010} distinct. Fractur...

+ward’ssciencewardsci.com800-962-2660 Sandstone Type: Sedimentary; clastic. Texture/Appearance: Grains generally sand-sized (1/16–2mm) normally sorted and somewhat rounded. May be poorly to well cemented. May also display visible fossils (not part...

wardsci.com 800-962-2660 Breccia Type: Sedimentary; clastic. Texture/Appearance: Coarse-grained angular rock fragments cemented in a fine- to very fine-grained matrix. Clasts have sharp edges. Color: Variable. Mineralogy/Chemistry: Composition var...

+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...