This fine-grained slab of volcanic andesite was collected from the rugged Elkhorn Mountains of Montana—an area rich in igneous history. Its dark, earthy surface is speckled with subtle feldspar and pyroxene crystals, offering a unique window into Montana’s volcanic past. The rock has been cut and polished on one face, making it ideal for display, study, or lapidary work.
Origin: Elkhorn Mountains, Montana
Size: Approx. 6" x 2.5" x 0.5"
Finish: One polished face
Uses: Display, teaching specimen, or cutting stock
A distinctive geological piece from Big Sky Country!