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 capped with a layer of clear quartz) and is about 6 mm diameter (about 0.2").
If you would like to pick this item up at our store front, please select "pick up" 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.