Glossary Blog

Carnelian is a reddish-brown, orange-brown, or yellow-brown variety of Chalcedony. Used in inexpensive jewelry and carved Chinese objects. The color is caused by iron oxide.  

Carbon is an element. Diamond, graphite, and carbon black are all carbon; the carbonates, like calcite, contain some carbon in combination with other elements.

The word carat comes from the seed of the carob tree, the biblical locust...

A Canary diamond.A fancy diamond with a strong, pleasing yellow color.