This stone was cut by Nick Liebowitz with a Fantasy cut design.
 
Color- 
Hue: Bi-color (Purple/Yellow)
Saturation: Moderate
Tone: Medium
 
Mineral:  Ametrine (amethyst/citrine)
Origin:  Bolivia
Weight:  11.0ct
Shape:  Round (12 sided)
Facet style:  Fantasy Cut
Dimensions:  14.7mm(flat to flat) x 15.2mm(point to point) x 7.3mm
Clarity: Loupe Clean