There are too few high-quality turquoises, and now the market will find ways to upgrade natural turquoise, which is generally accepted by the jewelry industry. So what are the turquoise optimization methods? Dyeing The dyed turquoise color is not natural. The dyed turquoise on the domestic market is often dark blue green or dark green, and is too uniform, but in the crack, the color becomes darker. The dyed turquoise color is very light, generally around 1mm, and some places may have a light-colored core. 2. Injection molding Injection molding includes the injection of colorless and colored plastics. Injection-treated turquoise can be identified by: Refractive index: Injection molding is generally less than 1.61. Relative density: The relative density of injection molding is low, generally less than 2.76. Hardness: Mohs hardness of injection molding, generally 3-4, the injection of turquoise is prone to scratches. Infrared spectroscopy: Strong absorption between 1450 cm and 1500 cm caused by plastic can occur, while in the newer injection molding varieties, a strong absorption band of 1725 cm appears. Stitchbond CHAOZHOU TEAMWAY TEXTILE CO., LTD , https://www.teamwaychina.com