Before you Polish the stone, it is necessary to perform a polishing to remove all traces after the cutting of the stone. Grinding can be divided into three operations: roughing (coarse polishing), polishing and lapping - polishing. If you have no machine to process the stones do the grinding on the glass.
To do this, take the glass (thickness 6-10 mm), and pour abrasive powder, moisten it with water and do the grinding in a circular motion. For grinding you can use fine-grained sandpaper. If you are going to grind the stone on the machine, use a circle of cast iron, copper or lead. Make sure that the surface of these circles was flat and smooth.
To make polishing on the lathe, remove the faceplate, then a protective (plastic) body and thoroughly with soap and a brush wash them. The cleaned parts set re to the place, buff fasten, sprinkle the round pinch of the powder, moisten the powder with water and spread it in a circle. As the polishing powders can use aluminum, zinc, chromium oxide, diamond dust. Turn on the motor and Polish the stone. But for polishing stone the machine you can use felt, thick felt or cloth. Make of these materials are circles with a thickness of 10-20 mm and mount them on a cast iron faceplate with shellac, a wax, a mixture of wax with rosin, or pitch, but is sandwiched between the metal and a polished sheet material is rubber. Before polishing felt, felt, cloth circles slightly moisten. During grinding or polishing, stone hold and press down gently, the hand movement should be directed against the rotation of the circle.
If you need to Polish hard stones such as granite, Jasper, and use the circles made of wood alder, aspen, poplar or beech. But make sure that they are rotated at a speed of 200 rpm, since at low speed buffing produces the best quality. The gems of the same type have different polishing ability. Each stone must be individually number and combination of powders, the rotation speed of the drive pressure.
To check the polishing quality of stone, polished finish wipe with a clean cloth, stand near the electric bulb and try it on the surface of the stone to reflect a hair burning lamp. If the reflection is seen, it means the polishing was successful.If you don't have the polishing tools, polishing stone replace varnishing with the use of colorless nail Polish.