Processing of the finished stone

The selection of materials must understand a variety of features and evaluation of essentials of the gem. Standard of choice of materials including raw materials, texture, color, transparency, hardness, block size, the shape can be used and other factors, to see its can work out what the value of the gem.

Habits, the gem industry diamond, ruby ??and sapphire, emerald, chrysoberyl cat's eye gem owned by high-grade gems; beryl, emerald, tourmaline (tourmaline), aquamarine, pearls are classified as mid-precious stones; topaz, crystal, turquoise, agate, amber, low-grade gems. The gems of the same species, according to texture, color, attainment of high, medium and low, the most obvious example is the emerald, a brilliant green glass quality jade ring face value of more than million, while the low-grade jade bracelets one nor several hundred dollars. Because of these characteristics of the gem, so the processing time to time by species choice of materials, cutting should be carried out by experienced personnel.

Generally raw materials, choice of materials, careful observation to understand the situation in the intrinsic quality, cracks, inclusions, crystal optical orientation, cleavage, etc., raw materials, to determine the part of the available and required removing the part, and then in accordance with the habits of specific gems, specific shape, the processing used to design the cut gems. Gem shape of the design should be conducive to the gem show light refraction, reflection or special optical effects, precious stones through a series of smooth and edge to show the inner and the appearance of beauty, more glorious one. In addition, we must consider the ability to maintain maximum volume of the precious stones.

Style, after a long period of practice and research, the international community has emerged a large number of popular gem design style, smooth quantity of precious stones in the various styles, angles, shapes are certain requirements, style is also often named If the diamond is often designed to fashions of the Quartet, the octagonal the Florence Langham (double rose) shape, diamond circular.

Design styles gem cutting, grinding and polishing. Cut gems also called "open material", usually with a silicon carbide circular saw gem cutting machine. Grinding and polishing a dedicated gems grinding polishing machine, carry out, the aircraft on the one you can stick a letter gem billet of the manipulator [vovi illustrations], the robot can adjust the angle, pressure; there is an electric disc, you can with the thickness of the different of the diamond grinding tablets and polishing discs, the general procedure is first coarse grinding after fine grinding, coupled with aluminum oxide, cerium oxide, or diatomaceous earth polishing agent for polishing. Although there are now semi-automated cutting and grinding machinery, processing of precious stones is difficult to implement standardized, mainly rely on there is a rich, good cutting and grinding technology and mill workers of some gemological knowledge to complete.

Some gems in the world, designed by celebrity Mingjiang processing. Such as the early 20th century, the world's largest diamond "Cullinan", that is, ￡ 80,000 in a large amount of money to hire Amsterdam, the Netherlands was famous craftsman Yue Asi chalcone to split and pondering the huge diamond was successfully split two, the poor artisans actually nervous blacked out in the past.

General gem, jade and jade processing, it is generally made into a non-planar geometry form a variety of ornaments and crafts. Part of the individual processing, such as emerald raw material (hereinafter referred to as "larva") is expected to open by the expert, as far as possible large to use, not chunk use is necessary to remove the high value (eg, green) or the use of natural raw materials of different texture and color "Jade" and "to" the distribution of cleverly designed a realistic image of the carving products, such as cabbage green leaves bones.

Zhuo's process includes the choice of materials, design, painted rough, voltage (cutting), chisel (chisel), red (flat), grinding (large sample), rolling (detail), Hook (pattern), light (glazing) and other steps. The jade division time carving huge jade works, making it invaluable. Use a few pieces of large raw material such as a few pieces of the giant jade sculpture of the National People's Congress, physical level a master craftsman Li Bosheng such Daiyue wonders "is focused on Beijing jade plant nearly 40 master, to be completed in six years, the value of immeasurable.

Style aspects, in addition to various manifestations of the large engraving of landscapes, birds and animals, mythology and artifacts, jade common "old decoration" and "decorated" two types of decorations. Refers to the late Qing Dynasty before official ornaments and ornaments of the nobility of old ornaments, such as "Ling tube, the cap is", "snuff", "Long Hook", "beads", "fan fall", "hi words"; decoration refers to the popular style since the late Qing Dynasty, such as egg ring face, heart-shaped, apricot, Aberdeen, bracelet, etc.. International popular style bottom and flat top arc Turtle-shaped, emerald, two ring surface. Other jade general crafts carving both the bracelet, pendant and other artifacts, rarely brought to the production of the ring surface of individual smaller jewelry.

Pearl processing also has its particularity. The round and shiny gem, only a small part of the total production, known as the original beads. Original bead processing generally have the following processes: (1) bleach, soaked in water, dip the neutralizer; (2) the use of light thermostat heating so that the colors are bright, show sheen; (3) quality grade, size, screening; (4) holes, flaws less drilling a single hole for rings, earrings, and other higher value; defects by drilling pairs of holes, for a pearl necklace; (5) mosaic or beaded

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