"WardsSci000444"

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

Exemplary display of hexoctahedral crystal shape.

Pure kaolinite powder, 200 mesh.

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

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

Pyroxene group; gray-green, coarse crystalline.

Black, Micaceous, glittery metallic.

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

Blue fluorapatite, pure crystalline, Moh's hardness of 5.

Pyroxene group; dark green, pure cleaved fragments.

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

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

Classic “peacock” aluminum ore.

Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.

Cut black mica cleavage sheets.

Deep blue, massive, with nepheline; key feldspathoid.