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Gem Selection High Type Zircon

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SHOPFavorite Stone Jewelry GINZA 188

AREATokyo > Ginza, Yurakucho

2016-02-04 to 2017-12-25

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Favorite Stone Jewelry GINZA 188

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Zircon can be divided into high type, medium type, and low type. Even they have the same name, but the crystal structure is different.
The difference in the crystal structure will be used to identify the type of the jewelry ー"the characteristic values (hardness, specific gravity, refractive index, etc.)" ーhigh characteristic value for "high-type", low for the "low-type". And of course, medium for "medium-type".
One of the features of high type zircon is the high double refraction. It has such high birefringence that it may display facet-doubling. This is the beautiful feature that you can only find in high type zircon.
http://www.favoritestone.jp/SHOP/225874/225954/list.html

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