Mineral 18

Specimen dimensions: 5¾ x 4 x 3 inches (145x100x175mm).

Specimen weight: 39¼ ounces (1116 grams)

Collection: Photographer’s personal collection

Provenance: Jessieville, near Little Rock, Arkansas

For reference: the U.S. penny is ¾ in. [19.05 mm] in diameter.