Display Specimen | Natural Volcanic Rock
This striking specimen of vesicular basalt comes from the historic Elkhorn Mountains near Winston, Montana—an area shaped by ancient volcanic activity. Formed from rapidly cooled lava, this basalt features a dark, dense matrix peppered with natural vesicles (gas bubble cavities), giving it a rugged, otherworldly texture. Its slightly glassy luster and solid heft make it a compelling piece for geology enthusiasts, collectors, or natural décor.
Origin: Elkhorn Mountains, Montana
Composition: Mafic volcanic rock, iron- and magnesium-rich
Features: Vesicular texture, unpolished natural finish
Size: Approx. 6–7" wide (see coin for scale)
Use: Shelf or desktop display, educational specimen, unique rustic décor
Each piece is one-of-a-kind, collected responsibly from a region steeped in Montana’s geologic past.