Opals are a pseudomorph: they are able to fill in and substitute for another material and form as fossils. In the right conditions, a raw opal specimen is formed in a cavity left by a piece of wood buried in sand or clay. The opal forms a fossil replica of the original object that was buried.
MOHs Hardness: 5.5-6.5
Origins: Lightning Ridge, NSW Australia
Care: All opals are fragile like glass: be extra careful to avoid abrasive surfaces, and avoid knocking your opal against hard surfaces. Extreme temperature shifts can cause cracks. To keep your opal clean, use warm water with mild soap and a soft toothbrush or cloth. Do not use a steam cleaner or ultrasonic cleaner.
Healing Properties: Precious opals that contain play-of-color are known to stimulate the emotional body and are considered an amplifier stone