Owyhee Blue Opal is from our mine in the Owyhee Mountains of Eastern Oregon.
The hardness is between 5.5 and 6.5 and is very durable. It is considered a "common opal" because it does not display any play of color (fire). This opal takes a glassy polish.
These nuggets measure between 1/2" - 2" in diameter.
Contact us for quantity pricing.