STF106c Stefoinite Cabochon Laguna Agate and black agate

and black agate

Cold Mountain Thundereggs are highly silicate and feature large amounts of brecciation that has also been filled with silica

13mm x 9mm

5 cm long)

STF106c Stefoinite Cabochon Laguna Agate and black agateStefoinite is a rare brecciated jasper from Wyoming, most likely Sweetwater County, discovered originally by Rudy Stefoin. Material is limited as the exact location is no longer known, and collecting last occurred in the 1970s. Typically, it shows tan jasper with brecciated patterns filled with translucent black, white, or blue chalcedony. This polished Stefoinite cabochon features varying shades of tan with dark brown and black within the