The most famous source of precious opal in the United States is the Spencer Mine in Idaho. This round cabochon is a Spencer "doublet" (a layer of precious opal with a layer of clear opal) and is about 6 mm diameter (about 0.2").
It's a good match with our second Spencer Opal cabochon to make a custom pair of earrings.
If you would like to pick this item up at our store front, please leave a note in "Order Special Instructions" during checkout.
If your delicate specimen is over 70lbs we will refer you to our local Crating company for safer freight shipping! *At customer expense.