animalvegetablemineral:Quartz. Clear quartz crystals can be colored by the use of electrostatic bond
animalvegetablemineral:Quartz. Clear quartz crystals can be colored by the use of electrostatic bonding of other chemicals onto the surface of the crystal: these are usual referred to as “aura quartz”–as in, “blue aura quartz” or “purple aura quartz.” -- source link
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