You Searched For: Gems+and+Tumbled+Stones
71 results were found
Almandine
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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...
Labradorite
/www.boreal.com/images/Labradorite.pdf
+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...
Beryl
/www.boreal.com/images/Beryl.pdf
+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...
Actinolite
/www.boreal.com/images/Actinolite.pdf
+ward’ssciencewardsci.com800-962-2660 Actinolite Ca2 (Mg Fe+2)5 Si8O22(OH)2 (Amphibole Group) Crystallography: Monoclinic; 2/m. Crystals usually prismatic; columnar or fibrous. Also massive or granular. Physical Properties: Cleavage: {110} perfect...
Malachite
/www.boreal.com/images/Malachite.pdf
+ward’ssciencewardsci.com800-962-2660 Malachite Cu2 (CO3) (OH)2 Crystallography: Monoclinic; 2/m. Rarely in distinct crystals; usually prismatic or fine acicular. Commonly in radiating fibers forming botryoidal or stalactitic masses. Also granular...
Corundum
/www.boreal.com/images/Corundum.pdf
ward’s sciencewardsci.com800-962-2660 Corundum Al2O3 Crystallography: Hexagonal-R; 32/m. Crystals commonly tabular on {0001} or prismatic {1120}; often rude barrel-shaped crystals. Usually massive; coarse or fine granular. Physical Properties: Cle...
Gabbro
/www.boreal.com/images/Gabbro.pdf
ward’s sciencewardsci.com800-962-2660 Gabbro Type: Igneous; intrusive. Texture/Appearance: Granular; medium-grained. Color: Dark medium gray green-gray or brownish-gray. Mineralogy/Chemistry: Mafic; with essential plagioclase (50%-75%) and pyroxen...
Graywacke
/www.boreal.com/images/Graywacke.pdf
wardsci.com 800-962-2660 Graywacke Type: Sedimentary; clastic. Texture/Appearance: Generally coarse-grained with angular to sub-angular poorly sorted grains in a clayey matrix. May show graded bedding; fossils are rare. Color: Gray to greenish-gra...
Tuff
/www.boreal.com/images/Tuff.pdf
+ward’ssciencewardsci.com800-962-2660 Tuff Type: Igneous; extrusive (pyroclastic). Texture/Appearance: Clastic texture with angular rock and mineral fragments and lapilli mixed with fine-grained volcanic ash partly cemented by sedimentary material...
Conglomerate
/www.boreal.com/images/Conglomerate.pdf
+ward’ssciencewardsci.com800-962-2660 Conglomerate Type: Sedimentary; clastic. Texture/Appearance: Coarse-grained rock containing rounded to subangular clasts of greater than 2mm in diameter scattered in a finer-grained matrix of sand silt and/or ...
Sodalite
/www.boreal.com/images/Sodalite.pdf
+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...
Breccia
/www.boreal.com/images/Breccia.pdf
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...
Sandstone
/www.boreal.com/images/Sandstone.pdf
+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...
Marble
/www.boreal.com/images/Marble.pdf
wardsci.com 800-962-2660 Marble Type: Metamorphic; regional and contact. Texture/Appearance: Fine to coarse-grained; granoblastic to saccharoidal. May appear patched or with streaks or banding that is deformed. Color: Variable commonly white pink ...
Serpentinite
/www.boreal.com/images/Serpentinite.pdf
wardsci.com 800-962-2660 Serpentinite Type: Metamorphic; regional. Texture/Appearance: Fine to coarse-grained lamellar or mesh-like; massive with frequent zonations and veins. Color: Dark green to black. Mineralogy/Chemistry: Ultramafic; composed ...
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