Limb Cast with and Agate fortifications

Limb Cast with and Agate fortifications- China. 7.25″ across. Limb Casts are created when agate is deposited in cavities formed by tree branches covered by volcanic ash. The wood burns away after being covered by the hot ash. Under the right conditions agate...

Petrified palm with agate fortifications

Petrified palm with agate fortifications- Palmoxylon- Green River Formation, Big Sandy Reservoir, Wyoming. Eocene epoch. – 50 mya . 8″ across polished face; 7″ tall … This fine specimen has 3 fronds protruding from the...

Pink Chalcedony "Cup

Pink Chalcedony “Cup”- (sometimes known as a Chalcedony rose) Yankee Dog Claim, Hidalgo County, New Mexico. 9 cm x 7 cm Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and...