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In the general case, the cutting of precious stones price list can be divided into faceted gemstones. The most common methods for the optimization of rare semi precious stones are heat treatment and thermal diffusion treatment, as well as dyeing method, crack filling method and spoke. According to the method, the dyeing method mainly uses the dyed multi-color semi precious stones to be dyed into blue with a dye. The crack filling method is to fill the cracks of the precious gemstones with more cracks in the cracks of the sapphire. Mainly used to treat corundum into golden yellow blue precious stones list, natural precious stones