Miner Shows What It’s Like To Crack Open An Opal Stone

Opals come in many sizes, colors, and bodies. Opals are commonly found in limonite, basalts, and sandstones. The phenomena exists when a fissure (splitting) of a rock has commenced and water from the Earth carries small silica particles into the crevices of the rock. Opals are rare and the darker the opal color, the more valuable they become (black opals are the rarest).