Excellent Large Ametrine Gemstone from Bolivia, 20.32 cts., 20 mm., Concave Trillion Shape


Gem: Ametrine Quartz
Weight: 20.32 cts.
Size: 19.90 mm.
Color: Purple/Yellow Bi-color
Clarity: VVS
Cut: Concave Hard Trillion
Locality: Bolivia
Treatment: None

Here is a stunning Ametrine! It has been concave cut into this hard trillion shape that is breathtaking. The orientation of color is quite nice, mixing the purple and yellow bi-color together to give the stone flashes of a pinkish lavender. Ametrine is a naturally occurring purple and yellow bi-color variety of Quartz that is formed by a unique twin law ("Brazil Law Twinning") where two separate individually colored crystals are intergrown to form an alternating "radiation" pattern of purple (Amethyst) and yellow (Citrine) triangles when viewed down the c axis. The two colors are oriented based upon their position inside the crystal to create the famous bicolor gemstones. The concave cutting produces that lovely radiant pattern of the flash that is spectacular in hand. This is a top notch Ametrine and is a fabulous collector’s gemstone. Enjoy!

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