"WardsSci000478"

Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.

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

Specimens illustrate important stages of mineral formation.

Pure translucent to white, rhombic cleavages, Mohs’ hardness of 3.

Clear rhombs showing double refraction.

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

Hematite-cemented quartz; orthoquartzite.

Gray-to-brown basaltic, with over 50% vesicles.

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