"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Good grade, green, massive; copper ore.

Coarse-grained plagioclase and pyroxene with some olivine.

Pyroxene group; dark green, pure cleaved fragments.

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

Amphibole group; black, coarse, massive.

Mica group; cut sheets showing basal cleavages. Books and sheets in bulk pack.

Black, Micaceous, glittery metallic.

Dark gray with abundant gas pocket vesicles.

Brown, fluorescent crystals intergrown in dolomite rock.

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.

Lustrous, black 'hard coal'.

Small, rounded pebbles and tightly cemented granules.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

Dark brown to black; polycrystalline zinc ore.

Earthy, porous calcareous tufa.