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Light gray, fine small clasts.

Clear rhombs showing double refraction.

Good grade, brass-yellow copper ore, massive.

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

Earthy, porous calcareous tufa.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

Put a piece of Earth's ancient history in the hands of your students.

Put a piece of Earth's ancient history in the hands of your students.

Cemented glacial gravel.

Formalin preserved pig dissection packages. Available in vacuum packs.

Compact Plant Fiber Masses.

Excellent for temporary storage or display.

Black, soft; most widely mined.

Fresh Green forsterite, classic “twin sisters” dunite.

Samples of Intrusive and Extrusive Igneous Rocks

Dark, coarse-grained, and composed chiefly of hornblende.