This volcanic opal is mined in Wonogiri Indonesia.,
This opal can have deep orange to olive green to dark red
light pale lemon colour.
Unusual colours from one opal field and the opal is translucent
so faceted suits these opals more than cabochons.
These opals are not oiled as most Indonesian opal is, but
It is rare to find opals over 5 carts with strong opal fire