A REALLY CUTE and AESTHETIC acanthite thumbnail from a recent small find at the famous Rayas Mine at Guanajuato, Mexico. Highly lustrous, cubic and elongated, dark gray acanthite crystals are beautifully stacked and branching, tree-like. Many of the crystals are hoppered or skeletal, included the crowning large acanthite. Just a nifty, two-sided thumbnail. SUPERB, highest quality competition level thumbnail.