This Specimen has been sold.
5.8" Carved, Blue Calcite Skull - Argentina
This is a large, hand carved/polished skull made out of blue calcite mined in Argentina. It's 6" long and probably weighs about 8 lbs. Really beautiful material.
Often sold under the name blue onyx or aquamarine onyx this beautiful, marbled, blue/caramel stone is actually calcite and not technically an onyx. It's quarried in the high mountains of Argentina at an elevation of over 17,000 feet and used as an ornamental or decorative stone.