Posted 6 years ago
Yesterday after work went to browse in charity shop and I found this beautiful carnelian stone with 2.5'' diameter for 99p. Whoever priced it, they thought it's a marble - marble eggs or carvings are abundant in charity shops and cheap. But this is semiprecious stone - carnelian and because it is banded it can be called agate too. It was once considered strictly the property of nobility, they were often buried with this gem. The surface cracks are natural, I read somewhere the stone has to be treated to get rid of the cracks.
Carnelian is a reddish-orange translucent variety of chalcedony. The colour is caused by iron impurities.