A gem of processing, the first relates to the opening is definitely a part of this, but not all gems need to go through this step. The purpose of opening the material is to minimize the internal defects and waste of raw materials on the basis of not more than cut out some can be made of bare stone blank. If the crystal clarity of the material itself is very good, you can skip this step.
Another kind of wooden cutting machine, the domestic use of relatively small
Not all gemstones need to be cut, many of the raw materials as long as clean and not dark, from the perspective of maximizing the value, are generally as far as possible in accordance with the most care standards to process.
Need to cut the stone, is nothing more than the shape is not suitable for direct billet Wai, there are too many cracks in the internal defects, or too dark to be cut into small or thin some to get a certain brightness. This tourmaline has a white cotton-like shape and cracks, a reasonable approach is to cut the location from the cracks. This can be made into a larger and cleaner than the other a small. If the small part of the color too bad or too small can only be wasted.
Second, red blank
Blank blank is the original stone grinding out the shape of the shape of the design, this link is generally carried out on the wheel
In the whole gem processing, non-essential cases, to bring masks, ear plugs, to prevent dust and noise pollution. To open the material and blanking, as far as possible with a finger cover, to avoid the saw blade or wheel contact with the fingers lead to injury.
Blank blank good raw materials, already have a rough outline
Adhesive is used to bond the stone blank to the sticking bar for subsequent processing operations
Precious stones. Market more precious stones glue red plastic, white plastic, green plastic, etc., usually based on the thermal conductivity of stones to choose glue, in order to achieve the best results. In my personal experience, the red plastic in the figure is more suitable for sticking to aquamarine, tourmaline, crystal and so on, white glue is more suitable for rubies, sapphires, topaz and so on.
Alcohol lamp. Used to pre-heat gemstone and gluing process of gluing of the adjustment.
Top level device. Used for top-level and correct gem and stick position.
Stick. Three kinds of sticks, according to the selected machine to choose.
Some gemstones can not put under fire to preheat, such as opal, tourmaline, etc., the temperature is too high is easy to crack. Preheat gem is to make gemstones and sticky glue rod sticking higher, polished not easy to fall off.
Top level device. Stick glue after the use of top-level device with fine-tuning to adjust the finger gem position.
Stick a good gem on the rod, the gem after the glue to wait until the natural cooling and then processing, stone and glue if the temperature is also high when the direct grinding is easy to lead to cracking or fall off.
Fourth, the shape
If the gem on the stick does not use plastic shaping machine, then the symmetry generally will not be too good, so also hand-Wai, so that the shape and design of the design as far as possible symmetry, consistent.
After a good shape, to the gem processing takes the longest grinding and polishing links. Grinding and polishing machines and equipment used in a variety of points.
The first, the car is somewhat similar to the stone arm polished grinding polishing equipment, high precision, out of the effect is better. The disadvantage is that relative to other processing equipment is less efficient, the machine cost is much higher. General Europe and the United States with a little more, unless the domestic individual gem cutting requirements of relatively high lovers, the general manufacturers have not seen.
The second processing equipment. By the wooden handle and wood machine large polishing disc composition, stone blanks can be directly on the disc after polishing, eliminating the grinding of the link, this processing method to do out of the stone into the rate is the highest, and the polishing effect Better, but because of this wooden handle is no scale, the angle of the gem is by hand to adjust, so polished out of the gem angle symmetry than other devices to be lower. This equipment is more common in Thailand and China, Shandong.
The third, is the artisan has been in use. By the mechanical handle, arm and a machine components. Machining efficiency higher than the first device, grinding angle accuracy than the second device is good, but the accuracy is slightly worse than the first, polishing, and take care of no second good. But this difference is not careful to observe the basic feel, of course, processing effects with personal skills and experience are also related.
In addition to the above described a start of the second device, the other three have to go through a grinding process. Grinding is generally divided into two processes, coarse grinding and fine grinding, fine grinding is to facilitate polishing. If you want to steal in the fine grinding and too casual, will lead to grinding the surface after the carved stones are not smooth and smooth, polished time will grow a lot, so instead worth the candle. After polishing the surface of the stone is not shiny, but the effect of polishing is not the same. Polishing effect.
The final completion of the polishing process, the stone from the stick on the degumming down, that is, we often see the finished stone products.