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

Earthy, porous calcareous tufa.

Yellow to orange crystal with a glassy luster and smooth, often transparent appearance.

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

Excellent for temporary storage or display.

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.

Discover Better Uses for Common Waste Materials

Cemented glacial gravel.

Formalin preserved pig dissection packages. Available in vacuum packs.

Compact Plant Fiber Masses.

Amazonite

Black, soft; most widely mined.

Fresh Green forsterite, classic “twin sisters” dunite.

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

Samples of Intrusive and Extrusive Igneous Rocks