Many people know that the formation of rough diamonds takes more than one billion years, and a rough-looking rough diamond needs to go through complicated cutting and polishing to turn into a diamond with a beautiful appearance. Today we will reveal the secret of the cosmetic procedure of a rough diamond.
Planning and marking is the first step in a diamond facelift:
Many companies now use optical measurement and marking instruments. Compared with manual marking, the instrument can analyze the rough stone more efficiently, plot all the inclusions, and indicate the location where the gem can be brilliantly cut, avoiding Most of the inclusions produce diamonds of higher clarity and higher value. Because even if there is only one degree of difference, it will make the weight difference by 1%, which may make the value of the diamond change greatly.
For most octahedral rough stones, sawing may be off the center of the gemstone, cutting two gems, one large and one small. The best shape and cutting style of octahedral rough is usually round brilliant. To produce two diamonds of equal size, some rounder rough stones may be best for sawing.
Saw sawing and shaping is the second step of diamond plastic surgery:
Because diamonds are the hardest natural material, planned and marked diamonds can only be cut with diamonds. The saw blade for cutting is a phosphor bronze disc coated with diamond powder and lubricant on the edge. After the diamond is fixed on the clamp, the saw disc rotates at a high speed to cut the diamond. However, modern laser technology has been introduced into diamond cutting, which greatly improves the processing efficiency of rough stones.
The segregated diamonds are then sent to be rounded and shaped. At this time, you need to grasp the basic shape of the diamond with experience. Is it an octahedron? Or dodecahedron? And the crystal characteristics. The general method is to place the rough stone on a high-speed rotating lathe, and then use other diamonds to round the rotating rough stone.
Polishing and polishing are the third step:
On a cast iron disc coated with diamond powder and lubricating oil, the rough stone is polished out of all facets. The polisher needs superb skills and precision, and constantly checks the polishing quality and facet position with a handheld magnifying glass. Throughout the process, they kept touching the diamond to the grinding disc, and then immediately checked it with a hand-held magnifying glass.
For an ordinary octahedral rough stone, it takes about 2 hours for the polisher to polish a 1 carat round brilliant diamond, about an hour for the bottom and one hour for the crown, and a total of 57 facets are polished. If there are small culet facets, it is 58.
It seems that for a diamond to become what we want, it has to be “grinded” in ninety-nine and eighty-ones. Therefore, beauty is so difficult to obtain, and we should cherish it.