Opal Stone – Natural, Cabochon, Blue

Although notoriously susceptible to damage from changes in temperature as well as scratches and blows, opal's beauty has captivated gem enthusiasts for centuries. However, with sensible precautions and protective settings, like this armband, these gems can make beautiful jewelry pieces. Photo by Arpingstone. Public domain.

Article: What are Gem Species and Gem Varieties?

Credit: Arpingstone