"WardsSci000444"

Classic, white chalk, massive; from Cliffs of Dover, England.

Pure kaolinite powder, 200 mesh.

Exemplary display of hexoctahedral crystal shape.

Black, Micaceous, glittery metallic.

Brownish gray, translucent.

Gemmy, sherry-colored crystals and sections approximately 3/8– 1/2"

Pyroxene group; gray-green, coarse crystalline.

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.

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