Nearly perfect 50/50 color separation that will cut a very large rectangle.
This material forms as nodules and is then painstakingly trimmed to extract these gorgeous chunks of rough before being tumbled to remove the dull surface and saw marks. I've heard the tumbling is done to get around the restriction of exporting rough stones from Bolivia -they get them exported as 'finished gems'
Ametrine occurs in a few locations around the globe but nothing compares to the Ametrine from the Anahi' Mine, in the Ricón del Tigre area of Bolivia - it's simply the best of the best!
A note on synthetics: they do exist and I see them for sale occasionally. The trained eye knows to look for slight 'bleeding' or mixing of colors where the amethyst meets the citrine. Synthetic stones will have a razor sharp dividing line
16.575 total grams / 82.875 total carats / 24 x 24 x 14 mm / clean