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Chlorite-bearing.

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

Gray andesite with phenocrysts of felspar and/or hornblende.

Classic, dark; from the Columbia Plateau.

Lustrous, black 'hard coal'.

Black, soft; most widely mined.

Cemented glacial gravel.

Small, rounded pebbles and tightly cemented granules.

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

Organized, economical survey of fossils.

Standard formalin preserved cats, packed in vacuum-sealed bags. One cat per bag.

Simulated silicone specimen, designed for modern learning.

The adhesive forms a waterproof seal, won’t crack or shrink, and stays flexible when dry. It won’t harm freshwater or saltwater life-forms.

Excellent for temporary storage or display.

Strikingly realistic large, museum-quality great white shark tooth. Length 5 ¹/₂". Resin. South Carolina.

Almandine is a type of garnet harvested from Alaska.