'Twilight Hills' Opalized Petrified Wood Necklace - Natural Designer GemstoneOpalized Petrified Wood is a fascinating geological phenomenon where the original wood structure is replace by opal, a mineral composed of hydrated silica. The term "wood opal" refers to the opalized wood, where the wood's organic structure has been replaced by opal. This process, while similar to regular petrified wood formation, results in a unique material with potentially blue or other colors. The opal replaces the wood cells, preserving the