This 7.44 carat, 11.5 mm. gem is the last of my ametrine parcel purchased from Steve Ulatowski / New Era Gems last February in Tucson.
It was another experiment to see if the gold / purple color break could show up and still have a stone that sparkles and glows.
The camera shows the color variation better than it appears to the eye.
Here is a 5.97 carat ametrine which measures 10.4 mm. across. In an experiment to see if the two colors would show rather than mix, I tried using concave facets on two sides of the pavilion to make it really bright, and using steep angles on the other two sides (similar to a method used for closed C axis tourmalines.)
It seemed to work somewhat. As usual, the camera showed the difference more than it seemed to me. And also added a bit an impressionist painting look to the stone.
Pictured here is a 4.64 carat ametrine that is 10.3 mm wide and has concave facets on the pavilion side.
The rough material for this stone is Bolivian origin obtained from New Era / Steve Ulatowski during the Tucson Gem shows last February. Before it was cut, it was easy to see that the amethyst / purple was isolated on less than half of the stone, but now the colors reflect and mix.
This 5.47 carat ametrine is half the purple amethyst color and half the orange citrine color, but it all gets mixed up in this sort of cut. The camera does a better job of “seeing” the two colors than my eye in most cases.
To see this for yourself, come by the Orcutt Mineral Society show this weekend being held Friday through Sunday at the Nipomo High School. It will be on display by the faceting demonstration along with a selection of other faceted gems.
Just posted another batch of recently faceted gems on the website. This time it is a mix of shapes, sizes, colors and materials.
Pictured here is a 4.52 carat ametrine with concave facets on the pavilion to really set off the purple and gold color combination.
Two other ametrines included in this batch finish up the parcel obtained from New Era Gems (Steve Ulatowski) last fall. However, more fun shortly with those picked up while in Tuscon in February.