Trancas Geodes, 10 lb lot Aventurine This polished specimen features translucent

This polished specimen features translucent and white quartz and agate with yellow-orange and red banding and an eye

Small double terminated point carved from quartz

Images show slabs wet and dry

the Arts and Mathematics as access points for guiding inquiry

Learn more about Prehnite on our mining page

Trancas Geodes, 10 lb lot Aventurine This polished specimen features translucentTrancas Geodes from Mexico. These geodes have a darker grey and tan exterior with a translucent to light blue interior. They can have a variety of crystal shapes inside, including fine druzy, large crystals, needle like crystals, or they can be almost solidly filled with chalcedony. Some can fluoresce green under short wave UV light due to trace uranium content. Size can range from a few inches to fist size. Approximately 15 pieces per 10 lb bag.