The facet of a jewel is necessary to open all its beauty and to hide shortcomings which often meet in natural minerals. The master at first long studies an emerald before choosing this or that type of processing.
It is required to you
- diamond tool;
- quadrant goniometer;
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To facet a stone, it is necessary to learn its hardness. Hardness of an emerald makes 7,5-8. Such indicator allows a stone to be almost impregnable to damages and scratches. At the same time such hardness does an emerald fragile therefore it is necessary to be very accurate and careful at a facet that on a surface of a stone there were no cracks.
Traditional facet for this jewel is "emerald". This technology is applied and to other minerals, but to an emerald - most often. This form of a facet turns an emerald into a step octagon. The "emerald" way of processing will allow to show as much as possible beauty and a play of light on sides. Besides such facet will protect an emerald from possible damages.
Pay attention that for low-quality emeralds which have cracks and various inclusions, facets "cabochon" and "spherical" will approach more. They will hide stone shortcomings. "Cabochon" has the equal area on the one hand and an oval smooth surface on the other hand, sides are not present absolutely. Such processing is applied for semiprecious and jewels.
The spherical form of processing is used for a facet opaque (lazurite, turquoise, etc.) and translucent (the moonstone, fell down also many other things) minerals. Sometimes this technology is applied to transparent jewels which have natural shortcomings (an emerald, sapphire, etc.).
Study also other ways of a facet. The emerald processed in the form of wedges will have triangular angular and top lateral sides. Lateral sides of a stone form four pyramids which bases are trapezes. The lower part of an emerald will be formed by a combination of triangular sides.
As emerald hardness very high, it is possible to process it only with use of the diamond tool. Check the lapidary machine, it has to have the special adaptation for the account of sides - a quadrant goniometer. This device processes all minerals semi-precious stones, including, and an emerald. The corner of sides depends on existence of inclusions in a stone.
Previously polish an emerald on a special circle (faceplate). It has to consist of an alloy of lead and tin, and the surface should be notched well ground plate from steel. You can think up an own facet, it is not obligatory to apply a traditional form.