OSUMILITE
Specimen osu-1

Dims: 0.5 x 0.5 x 0.4" (1.3 x 1.3 x 0.9 cm)

Wt: 9 g w/ box

Obsidian Cliffs, McKenzie Pass Area, Lane County, Oregon, U.S.A.

At least 4 tiny Osumilite crystals rest on the rhyolite base of this small thumbnail specimen. These crystals do not exceed 1 mm in either thickness or diameter and appear to be in excellent condition, showing no damage. All have excellent hexagonal tabular form with large flat terminations and are black in color and vitreous in luster. They appear to be completely opaque. The piece is hot-glued into a plastic thumbnail box.

Dims: 1.6 x 1.1 x 1.0" (4.0 x 2.7 x 2.6 cm)

Wt: 0.8 oz. (22 g)

MacKenzie Pass, Lane County, Oregon, U.S.A.

Many tiny Osumilite crystals rest in the hollows of the pale gray matrix of this thumbnail piece. These crystals are in excellent condition, showing almost no damage, and do not exceed 1 or 2 mm in diameter. Their hexagonal form is good, and hall have a tabular habit, taking on the form of tiny six-sided platelets. They are black in color, have a vitreous luster and are opaque. They also appear to be the only mineral present in their matrix.