Columbia group basalt, Miocene. We have always enjoyed fossils and agates. We constantly seek quality materials sourced at fair prices or in the field. Excellent chalcedony voids in the center of this slab.

Columbia group basalt, Miocene. Excellent chalcedony voids in the center of this slab. The thin cut allows for a nice translucency when back-lit. From the old Gronkle collection, over 35yr old cuts. 5″×4.5″ and 1/8 thick. We promise to try and provide the highest quality of polished stones and customer service, so that u feel […]

Columbia group basalt, Miocene. Excellent chalcedony voids in the center of this slab. The thin cut allows for a nice translucency when back-lit. From the old Gronkle collection, over 35yr old cuts. 6″×6.25″ and 3/16 thick. We promise to try and provide the highest quality of polished stones and customer service, so that u feel […]