This is a stunning GIA Certified Ametrine
The GIA report reads as follows:
GIA Report Number: 5222290593
Shape: Octagonal
Cutting Style: Modified Step Cut
Cutting Style: Crown:
Cutting Style: Pavilion:
Transparency: Transparent
Color: Zoned Purple And Yellow
RESULTS
Species: Natural Quartz
Variety: Amethyst-Citrine
Geographic Origin:
Treatment:
Item Description: One loose stone
Weight: 37.67 carats
Measurements: 20.36 x 17.28 x 12.47 mm
Comments: Sometimes known in the trade as "Ametrine".
Internal notes and additional description:
Weight: 37.67 carats
Clarity: Very Very Slightly Included: Eye Clean, no inclusions visible to the naked/unaided eye, near loupe clean, very minor inclusions visible under 10x magnification.
Colour: Zoned Purple And Yellow
Hue: Purple And Yellow
Tone: 4-5 Medium Light-Medium
Saturation: 4 Moderately Strong
Treatment: None
Origin: Bolivia
Internal SKU: GIAAT0002
Please quote SKU if you have any questions about this gem.