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Gemstone Crystal System Density Hardness Refractive index Treatments
Ametrine hexagonal (trigonal) 2.66 7 1.544-1.553 Heat and irradiation have been used experimentally to create an ametrine-like bicolored product out of amethyst.

 

 

 

 

ametrine

Color:
A combination of purple amethyst and golden citrine

Clarity: Type II
Optic Character:
DR Uniaxial positive
Cause of Color: Color centers and iron impurities; irradiation
Fluorescence: Inert
Fracture : Concoidal

Luster : Vitreous
Cleavage :
None
Durability: Good

Characteristics for Identification:
Color zoning; twin planes; bulls eye interference figure, 2 and 3 phase inclusions, negtive crystals

Localities:
The only significant source of natural ametrine
is the Anahí mine, in eastern Bolivia.


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Ametrine
Chemical: SiO2

Ametrine is a variety of quartz that contains both amethyst and citrine sectors in the same crystal.

Ametrine is only found in one mine in the world. The Anahi Mine in Bolivia is the major world producer of ametrine. The mine first became famous in the seventeenth century. A Spanish conquistador received it as a dowry when he married a princess from the Ayoreos tribe named Anahi. Ametrine was introduced to Europe through the conquistador's gifts to the Spanish queen.

Synthetic ametrine is now produced.
ametrine

Quartz Family:

Amethyst
Citrine
Ametrine
Rutilated Quartz
Smokey Quartz

Rose Quartz
Dendritic Quartz
Tourmalinated Quartz
Phantom Quartz


Microcrystalline
Quartz
:

Agate
Chrysoprase
Jasper
Carnelian
Bloodstone
Onyx