13.31ct TOP MOST EXTREME!!! 100% GENUINE *RARE* AAA AMETRINE - Purple/Gold/Yellow - Bicolour - VVS

13.31ct TOP MOST EXTREME!!!! 

100% GENUINE REAL *RARE* AAA AMETRINE - Purple, Golden Yellow - Bicolour  - VVS 

MAKE AN AWESOME RING OR PENDANT

Ametrine is a color-zoned variety of macrocrystalline quartz. It is sometimes referred to as trystine and is a natural bicolor combination of amethyst and citrine. Color band combinations in ametrine can range from pale-violet to deep-purple and from pale-yellow to gold-brown. Ametrine's color split is rather abrupt and is not a smooth blend of colors. Both the violet and yellow colors found in ametrine are from traces of iron. The only difference between amethyst, citrine and ametrine is the level of oxidized iron impurities in the visible color-zone bands. All three gemstones obtain their color from iron and all three varieties have a silicon dioxide chemical composition.

Ametrine comes in bands of yellow and purple. It is easily identified by its unique bicoloring. Since it has a limited color range, it can easily be distinguished from other bicolored stones. Ametrine is quartz, so it can be easily scratched by harder materials, such as sapphire and spinel. Simple scratch tests can distinguish and identify ametrine from other gemstones.

Ametrine colors typically only reach a medium level of saturation of color, which means that most ametrine specimens are not very vivid or intense. Some synthetic or lab-grown ametrine can have extremely bright, vivid and intense colors and since this is not normal for ametrine, the authenticity of such stones should be questioned. Ametrine typically exhibits an abrupt color transition from purple to yellow, lacking any smooth color band transitions.

The Anahi Mine, located in Bolivia is the world's largest source for precious ametrine. The mine became famous in the 17th century when a Spanish conquistador received an ametrine stone as a gift. He had received the gift when he married a princess from the Ayoreos tribe by the name of Anahi from Bolivia. Ametrine was introduced to the rest of Europe when the conquistador presented the stone to the Spanish queen. Currently, the mine is operated by Minerales y Metales del Oriente. Although this source has been known to Bolivian natives for hundred of years, it has only been worked at a commercial level since the 1980's. There are also other ametrine deposits in Brazil (Rio Grande de Sul).

PICTURE IS ENLARGED 

Gem Type:  TOP MOST EXTREME!!! 100% GENUINE REAL AAA Natural AMETRINE

Shape:  OCTAGON   

Quantity:  1

Total Weight:  13.31ct

Colour:   Purple,Golden Yellow 

Clarity:  VVS

Size:  20.17x11.41x6.98mm

Treatment:  Unheated/Untreated

Origin:  BOLIVIA

Hardness:  7.0 MOH'S SCALE