Raw Ethiopian Opal Beginner Crystals Its formula is Cu6Si6O18·6H2O (also
Description
Its formula is Cu6Si6O18·6H2O (also reported as CuSiO2(OH)2)
Honey Calcite
Purple Mica pieces in small
When used in unison with other crystals
Color Changing Fluorite from the Rogerley Mine
Raw Ethiopian Opal Beginner Crystals Its formula is Cu6Si6O18·6H2O (also
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