Ametrine is a special type of quartz which is both amethyst and citrine, amethyst is a purple quartz crystal colored by FE3+ ions (it's a fancy kind of iron) which is then exposed to low levels of background radiation. The citrine comes from varying heat and iron ions creating a golden color.
This listing is for one raw ametrine crystal. Some crystals have saw marks as this is faceting and cutting rough.
Mandala in background is 4" across for size comparison.
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