18.80 CTS JADE CARVING DRILLED -BURMA GRADE A [ST8162]

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Colors
Certified Gemstone

SEDA GEMS

JADE CARVING

A GRADE

This is a natural untreated stone from Burma hand carved in China.

Weight 18.80 cts app

Size 25 x 16 x 5 mm app

There is a lot of treated material on the maket but im lucky as i have a chinese gem dealer who buys jade for me.

A grade is jewelery standared which is not treated,dyed or resin added. 


Jade', or yu, as it is called in China, is strictly speaking a generic term for two different gems, nephrite and jadeite. The name is derived from the Spanish 'piedra de ijada', loin-stone, jade having been recognised by the Amerindians as a remedy for kidney ailments. Because of its beneficial effect on the kidneys, the stone was also known as 'lapis nephriticus'. That, indeed, is where the term 'nephrite' came from.

Jadeite and nephrite are both regarded in China as 'zhen yu', 'genuine jade'. It was not until the beginning of the 19th century that mineralogists and gemmologists started to differentiate between them, since they bear a considerable resemblance to each other in terms of their appearance, their hardness and the properties they exhibit when being processed. Both are tough, since they consist of dense, close-grained, matted aggregates, but they differ from one another in their chemical composition and colours. Nephrite ranges mainly from mid to dark green or grey-green, but it can also be white, yellowish or reddish. Rarer, and somewhat tougher, jadeite displays hues which include green, but also white or pink, and reds, blacks, browns and violets. In both minerals, the way the colour is distributed varies a great deal. Only in the very finest jade is the colour evenly distributed. Both nephrite and jadeite often have veins, blemishes and streaks running through them, though these may not always be regarded as flaws. On the contrary, some of these patterns are considered particularly valuable.

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Pricing & Details

Bid Increment $1
Starting Bid $18
Auction ID 417603
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Starts 7th Mar 2018 6:00pm PST
Ends 10th Mar 2018 3:03am PST

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