宝石的花式切工(英文)

出处:水晶,鉴赏网 日期:2010-04-12 09:08 作者:无盐 人气:







Fancy Cuts

Asymmetrical crystals such as macles are usually unsuitable for symmetrical cuts such as the Round Brilliant, and lend themselves to a "Fancy Cut" style. These fancy cuts can follow the best attributes of the rough stone while eliminating or avoiding cleavage planes, internal flaws, and inclusions. Popular fancy cuts include the "Baguette" (bread loaf), "Marquise" or "Navette" (little boat), "Princess Cut" aka Square Brilliant Cut, "Heart", "Briolette" (a form of Rose cut), Pear (teardrop), and the Trillion which is triangular in shape.






Concave Faceting

Concave gem faceting cuts are a relatively new trend on the gem-cutting scene (amethyst - above, left). Invented by Doug Hoffman in the early 1990s, the technique was perfected by American gem-cutter Richard Homer. The unique conical-shaped faceting creates a high amount of brilliance by refracting and dispersing more incident light than a conventional gem facet cut.

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Popular variations of the step-cut are the Scissor-Cut or Cross-Cut, Baguette Cut, and the French-Cut (above, center). These cuts add slightly more brilliance to the stone a dark stone, and are good for concealing internal flaws. The french cut is also used on very small stones where a brilliant cut would not be practical.

Navette Cut

The "navette-cut" or marquise cut (shown in simplified form - above, center) is a popular choice for colored stones such as topaz, citrine, Amethyst, and Aquamarine. The navette cut may have been the creation of King Louis XV of France, who was so taken with the delicate shape of his courtesan's (Marchioness Madame de Pompadour, below, right) mouth that he commissioned his court jeweler to create a gem cut in its likeness.





Composit Gemstone Cuts

Composit gemstones are created by bonding two or more materials together to form one gemstone. When the final gem is made of two different materials it is called a "doublet," and when made with three, a "triplet." Common doublet or triplet gemstones are Emerald and Opal, usually combined with quartz or glass. Compositing is used to improve color and add durability. In faceted composite stones, the crown would be the natural material. 水晶

So far, the consistent theme in all of these fancy cuts is their symmetry. As a fancy gem cut takes on a more asymmetrical shape, such as the Isosceles Triangle Cut citrine above (left, with trillion diamond), it would be labled as a "fantasy cut."


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