Ametrine

Ametrine is a relatively new gem term, and the word is a combination of Amethyst and Citrine. Ametrine is a unique gemstone in that it is essentially combined of two separate gemstones. Although Amethyst, the purple variety of Quartz, and Citrine, the yellow/orange variety of Quartz belong to the same scientific mineral classification, they have always been distinguished as individual gemstones. The unique color combination of Ametrine has sparked an interest and appeal to this distinctive gemstone.
Chemical Formula SiO2
Color Yellow, Purple, Multicolored
Hardness 7
Crystal System Hexagonal
Refractive Index 1.54Â -Â 1.55
SG 2.63Â -Â 2.65
Transparency Transparent
Double Refraction .009
Luster Vitreous
Cleavage Indiscernible
Mineral Class Quartz