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16.2 Pound: Howardite Silicated Volcanic Tuff Breccia with Opal-Healed Fractures . . .
Howardite refers to silicified Miocene volcanic tuff breccia enriched by common opal and chalcedony, forming a dense, multicolored mass of welded ash fragments, silica‑cemented clasts, and common-opal‑healed fracture networks . . .
Nevada “Howardite” in the lapidary sense comes from one very specific place: the Velvet Mining District, Pershing County, Nevada, just south–southwest of the old Tunnel Hill Diatomite Mine . . .
Cut and rough on longest faces . . .
Measures 7.2”x7.5”x4.5” at its widest points . . .
Photographed dry under daylight . . .
Visual assessment used for mineral identification . . .
Check out my other fine minerals . . .
Thank you,
seller:mineral_aesthetics
