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wardsci.com 800-962-2660 Quartz (variety Amethyst) Si O2 Crystallography: Hexagonal -R;32 (low quartz). Hexagonal; 622 (high quartz). Crystals not common. Usually massive, coarsely crystalline. Physical Properties: Cleavage: Generally none; occasi...

wardsci.com 800-962-2660 Quartz (variety Jasper) Si O2 Crystallography: Hexagonal -R; 32 (low-quartz). Hexagonal; 622 (high quartz). Cryptocrystalline; massive granular. Physical Properties: Cleavage: Generally none; occasional indistinct rhombohe...

+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 materia...

+ward’ssciencewardsci.com800-962-2660 Magnetite Fe+2Fe2+3O4 (Spinel Group) Crystallography: Isometric; 4/m32/m. Frequently in octahedral crystals; rarely dodecahedral. Commonly coarse-to fine-grained granular, massive. Physical Properties: Cleavag...

1 All About Elements: Neon 2 boreal.com | 800-387-9393 Boreal’s All About Elements Series Building Real-World Connections to the Building Blocks of Chemistry The periodic table of elements is an essential part of any chemistry classroom or science...

+ward’ssciencewardsci.com800-962-2660 Quartzite Type: Metamorphic; regional. Texture/Appearance: Massive, with generally small grain size; sometimes saccharoidal. Grain size (sand size, 1/16-2mm) dependent on original detritus. Generally non-folia...

+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: {10...

wardsci.com 800-962-2660 Peridotite Type: Igneous; intrusive. Texture/Appearance: Medium to coarse-grained; massive, granular, sometimes porphyritic. Color: Medium gray to greenish-gray. Mineralogy/Chemistry: Ultramafic, with mafic minerals greate...

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

+ward’ssciencewardsci.com800-962-2660 Muscovite K Al2 (Si3 Al) O10 (OH, F)2 (Mica Group) Crystallography: Monoclinic; 2/m. Distinct crystals rare; usually tabular with prominent {001}. Usually in lamellar masses or small flakes. Foliated in large ...

+ward’ssciencewardsci.com800-962-2660 Bornite (Na,K) AlSi3 O8 (Feldspar Group) Crystallography: Orthorhombic - dipyramidal (2/m 2/m 2/m) Crystals rare; commonly massive. Physical Properties: Cleavage: None. Fracture small conchoidal, uneven; britt...

+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°, ...

+ward’ssciencewardsci.com800-962-2660 Quartz (variety Chert) Si O2 Crystallography: Hexagonal -R; 32 (low-quartz). Hexagonal; 622 (high quartz). Cryptocrystalline; massive granular. Physical Properties: Cleavage: Generally none; occasional indisti...

+ward’ssciencewardsci.com800-962-2660 Halite NaCl Crystallography: Isometric; 4/m32/m. Cubic habit; other forms very rare. Also massive, granular to compact. Physical Properties: Cleavage: {001} perfect. Fracture conchoidal; rather brittle. Hardne...

wardsci.com 800-962-2660 Opal SiO2 • nH2O Crystallography: None, amorphous. Massive, often in rounded and botryoidal forms, sometimes pisolitic. Physical Properties: Cleavage: None; conchoidal fracture. Hardness: 5.0-6.0. Specific Gravity: 2.0-2.2...

wardsci.com 800-962-2660 Quartz (variety Smoky) Si O2 Crystallography: Hexagonal -R; 32 (low-quartz.) Hexagonal; 622 (high-quartz.) Crystals are commonly prismatic, with prism faces horizontally striated, and usually terminated by a positive and n...