95% of the opla supply comes from Australia.
95% of the opla supply comes from Australia
The unmodified opal is a common mineral located worldwide. The most important deposit locations for opal minerals are: Australia, and Mexico. However, Australia remains the richest in said mineral, having more than 3/4th of the world's common opal.
95 percent of the world's opal comes from Australia.
Opal is made of silica, but it technically is not a mineral.
The entire supply of opal, which usually comes from the continents of earth.
Neither. Opal is a mineraloid, as it does not have a sufficiently organized structure to be considered a mineral.
Opal ia a hydrated silica mineral.
what minerals make up opal
Opal is not a mineral, but a silica gel.
Opal does not possess a crystalline structure, one of the requirements of a material to be considered a mineral.