'Pretty as a Picture' Opalized Petrified Wood Necklace - Natural Designer GemstoneOpalized Petrified Wood is a remarkable geological occurrence where the original wooden structure is replaced by opal, a hydrated silica mineral. Known as "wood opal," this material retains the wood's organic patterns through the opalization process, which can impart hues such as blue. Unlike typical petrified wood, the opal replaces the wood cells, preserving intricate details. Classified as a fossil, this wood dates back to the Miocene era, around