Ametrine

What is Ametrine?
Most people have never heard of ametrine and are very surprised to see purple and yellow in a single transparent gemstone. Ametrine is a rare gemstone with a finite supply that is produced in commercial quantities at only one mine in the world. It is a relative newcomer to the gemstone trade, being available in small quantities for just a few decades.

Ametrine is a variety of bicolor quartz that has zones of amethyst (purple) and citrine (golden yellow) in contact with one another in a single crystal. The words AMEthyst and ciTRINE were combined to yield the name "ametrine," which is widely used in the gemstone trade. This material is known by other less-frequently used names including: "amethyst-citrine," "trystine," "bicolor amethyst," "bicolor quartz," and "bolivianite." The bolivianite name is a response to the material being designated as the national gemstone of Bolivia. this was all created by Geology.com! {| class="wikitable"
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Physical Properties of Ametrine
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 * Chemical Classification
 * Silicate
 * Color
 * Purple amethyst in contact with golden-yellow citrine
 * Streak
 * Colorless - harder than a streak plate
 * Luster
 * Vitreous
 * Diaphaneity
 * Translucent to transparent
 * Cleavage
 * None - breaks with conchoidal fracture
 * Mohs Hardness
 * 7
 * Specific Gravity
 * 2.6 to 2.7
 * Diagnostic Properties
 * Conchoidal fracture, amethyst and citrine in a single crystal
 * Chemical Composition
 * SiO2
 * Crystal System
 * Hexagonal
 * Uses
 * Gemstone
 * }
 * Diagnostic Properties
 * Conchoidal fracture, amethyst and citrine in a single crystal
 * Chemical Composition
 * SiO2
 * Crystal System
 * Hexagonal
 * Uses
 * Gemstone
 * }
 * Uses
 * Gemstone
 * }