Olivenite

A bold Milpillas olivenite with unusually dark, near-black prismatic crystals arranged in a dramatic spreading spray — the deep coloration reflects high iron content typical of this locality's darkest material. Bright forest-green flashes catch the light on fresh crystal faces and edges, making this a particularly striking miniature from one of Mexico's premier copper secondary localities. Domestic shipping included.

• Locality: Milpillas Mine, Sonora, Mexico
• Dimensions: 22 × 17 × 21 mm
• Weight: 5 g