AIG CERTIFIED Top Quality 29.90 Natural Afghan Mint Green Tourmaline

688

存货单位
尺寸（毫米）: 19.970 x 13.920 x 12.620mm
重量 (cts): 29.900
Certified Gemstones: 是的
Treatment: No Treatment
Clarity: VVS
类型: Faceted
Shape: Cushion
Certificate Gem Lab: AIG
颜色

Tourmaline is extremely popular among collectors and is a well-known gemstone. It is the most multicolored mineral type known, occurring in virtually every color of the spectrum. Individual stones are often multicolored and are unsurpassed in their beauty. The color of some Tourmaline can be enhanced through Heat treatment. Some greenish stones can be made deep green, some brownish-red stones can be made red, and some light pink stones can be made colorless through heating. Tourmaline has many interesting optical properties. Many green and blue specimens are strongly pleochroic. Indicolite is one of the most valuable and collectible of all elbaite Tourmaline's, with hues spanning from lighter to deep, intense blues. Cutting indicolite can be a task for even the most skilled of cutters, as it is strongly Pleochroic and appears darker when viewed down the crystal. This factor must be taken into consideration when cutting, as a loss of transparency and brilliance can occur in darker specimens.

存货单位
尺寸（毫米）: 19.970 x 13.920 x 12.620 mm
重量 (cts): 29.900
Certified Gemstones: 是的
Treatment: No Treatment
Clarity: VVS
类型: Faceted
Shape: Cushion
Certificate Gem Lab: AIG
颜色

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