Peruvian Blue Opal Pendant - SOLD 1.048"Andean blue opal is a translucent form of the gemstone, often infused with dark brown or black dendritic crystals across its surface. Like other opals, the gemstone forms from silica rich water filtering through porous sandstone, depositing the mineral to be heated and pressurized into the beautiful gem. This pendant contains a polished 1. 048" gem of Andean blue opal from Peru set into a sterling silver prong. It comes with an 18" silver chain in a