Specimens

Good grade, bronze-colored ore, massive.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

White to gray, medium to coarse-grained, crystalline.

Sale

Deep blue, massive, with nepheline; key feldspathoid.

Bright metallic cubic cleavages; lead ore.

Deep purple crystal clusters.

Pure, white, earthy “China clay”.

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

Amphibole group; black, coarse, massive.

Black, high grade, foliated, greasy feel.