Brown Aragonite Sphere | 107 mm, 4.2 in | 1.9 kg unheated sapphire Clarity: Clean to the eye

Clarity:  Clean to the eye

Physically

He brought one to a fossil dealer and asked: "I hear that you will pay money for stones like this"

Shape: Oval Cabochon

This deep color is no longer being produced from this locality

Brown Aragonite Sphere | 107 mm, 4.2 in | 1.9 kg unheated sapphire Clarity: Clean to the eyeThe principal member of the Aragonite Group, aragonite is the second most common polymorph of natural calcium carbonate (the most common is calcite). It is significantly less widespread and abundant than calcite and is formed under a much narrower range of physiochemical conditions. It is metastable relative to calcite and often converts to calcite accompanying changes in the environment. It is nearly always a low temperature, near surface mineral.