Ametrine is a part amethyst and part citrine variety of the quartz family.
Occurrence
Ametrine is found in alluvial deposits or in geodes. Bolivia is the most important source of the stone.
Ametrine Properties
- Specific Gravity: 2.65
- Refractive Index: 1.54-1.55
- Birefringence (DR): 0.009
- Luster: Vitreous
- Crystal Structure: Trigonal
- Composition: Silicon dioxide
- Hardness: 7
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