18K Yellow Gold and Platinum 1970's 33.77ct Ametrine & .05ct Diamond Ring

Stones: (1) Emerald Cut Ametrine weighing 33.77 Carats & (8) Single Cut Diamonds equaling .05 Carats G Color SI1 Clarity

Size: 6

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This is a one-of-a-kind piece and cannot be reordered!

Ametrine, also known as trystine or by its trade name as bolivianite, is a naturally occurring variety of quartz. It is a mixture of amethyst and citrine with zones of purple and yellow or orange. Almost all commercially available ametrine is mined in Bolivia.

The colour of the zones visible within ametrine are due to differing oxidation states of iron within the crystal. The citrine segments have oxidized iron while the amethyst segments are unoxidized. The different oxidation states occur due to there being a temperature gradient across the crystal during its formation