"gel+box"

Dense and massive.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

Spinel group; iron-black, massive; natural magnet.

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

Light pink, massive, crystalline, translucent.

Black, high grade, foliated, greasy feel.

Fine to medium-grained with biotite.

Gray, fine-grained, massive contact rock.

Clear, pure cleavages, Mohs’ hardness of 2.

Gray to buff, with numerous ooliths and fossil fragments.

The Most Abundant Minerals in the Earth’s Crust

Effectively removes nail polish.

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Clear rhombs showing double refraction.