Gem silica from the Inspiration Mine T
The vivid blue-green areas visible in the stone are caused by chrysocolla dispersed within the quartz structure, rather than being a separate layer or coating. Clear to lightly tinted zones represent purer chalcedony with less copper influence, while the tan to brown areas are residual host rock and iron-rich material from the original copper deposit. This intimate mixing of quartz, chrysocolla, and remnant matrix is typical of gem silica from historic Arizona copper mines.
25.830 carats / 22.8 x 22.6 x 7.7 mm
Estimate: $350 - $400
