Olive Green Opal 8x10-9x13mm Side Drilled Pebble - 15-16 Inch

A form of common opal, Olive Green Opal certainly features its namesake olive, but blends it with browns, tans and even a pea green from time to time. Common opals are classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. And unlike precious opals, common opals do not exhibit iridescence.