Ametrine is not treated in any way.
Ametrine comes in bands of yellow and purple. The colors only reach a medium level of saturation and are never very dark. Ametrine typically exhibits an abrupt color transition. As for color, The two colors don't offer choices, cut is all that counts.
Ametrine is most typically faceted in a rectangular shape with a 50/50 pairing of Amethyst and Citrine, Sometimes a checkerboard pattern of facets is added to the top to increase light reflection. Ametrine can also be cut to blend the two colors so that the resulting stone is a mix of yellow, purple, and peach tones throughout the stone. Ametrine is also popular among artistic cutters and carvers who play with the colors, creating landscapes in the stone
As of now ametrine hasn't earned any fame. There is the possibility that ametrine will become very rare due to the shortage of deposits. Please be aware of the source of your ametrine when the appearance provides perfection!
Many of the Ametrine in larger sizes with a perfect look and deep burgundy and golden color is synthetic / Lab created or a treated quartz which is dyed and irradiated.
We suggest that you look for traditional colors in Amethyst, Most larger sized amethyst in darker or different colors are not amethyst at all, We will be looking at this gem in the months to come and request testing if the gem does not look athentic.
Last Update: 7 Sep 2008