When buying, it is necessary to pay attention to the proportions of the faceted gemstone (symmetry, the correct location of the faces), uniform polishing of the looks, the absence of chips.
The type of cut is determined by the pattern, and the number of facets applied to the insert. The shape of the cut is determined by the shape of the contour of the belt (girdle) in the plan (circle, oval, square, rectangle, etc.).
If we are talking about faceted gemstones, it is essential to know the terms that are used in this area:
A girdle is the edge or belt of a stone that forms its perimeter. With the help of a rundist, the stone is attached to the product.
The crown, or the top of the gemstone, is the upper part of the gemstone above the rundist.
Pavilion, or the bottom of the gemstone, is the lower part of the stone, located under the rundist.
Kaletta is the lowest point of the stone.
A platform, or table, is a flat upper face of a gemstone. The term "pad size" is used to characterize the width of this face.
The shape and type of cut of precious stones should ensure its external beauty, a high degree of play, and brilliance. A good cut can represent the color of the gemstones in the best way, while a lousy cut can cause the gemstone to look too dark or too light.
To determine the quality of the cut, you can use a magnifying glass. Look at the gemstone from top to bottom through its platform. Is it's upper face-centered and symmetrical? To quickly verify the symmetry of the stone, just look at the edges of the site. The lines should be straight, regular, and parallel to each other.
In addition, it is necessary to pay attention to the presence of the slope of the platform. Often the stones have chips on the calette and the rundist. This is a marriage.
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