In the traditional international market, measuring emerald prices is based on four main elements: color, brightness, diaphaneity, and weigh. 1. Emerald color The color of the emerald is deep and expensive, and the dark green and blue color is the best; but the too deep color will affect the transparency of the gem. 2. Emerald gloss In Colombia, the emerald's gloss is the second most important price evaluation standard after color. The emerald with high gloss makes people feel that the gems are very vivid and vivid, and they don't have a sense of gloom. 3. Emerald purity In the process of the emerald, there are many other elements such as mica, pyrite, calcite, etc., so there are many impurities and cracks. Inclusions (impurities) are a testament to natural emeralds. But the amount of impurities in the gemstone is an important criterion for distinguishing the quality of the gemstone. Emerald is commonly known as the "garden" of inclusions. The emerald with less impurities is more precious. Colombian emerald has typical solid, liquid and gas three-phase inclusions. 4. Emerald weight The production of emeralds requires a very special geographical environment. Generally, an emerald bare stone can be excavated in 100,000 emerald ores, and the yield of faceted gemstones made of emerald bare stone is only 10% - 30, sometimes a few tens of grams of a piece of raw material, can only be polished a small amount of 2-3 carats of finished products, the common weight in the finished product is 0.2-0.3 carats, generally less than 1 carat. Therefore, the price of high-quality emeralds increases with weight, and the price of high-quality emeralds larger than 0.5 carat is higher than that of the same weight. Cotton Chambray Fabric,Cotton Fabric In Bulk,Cotton Fabric For Shirt,Shirt Cotton Fabric Shaoxing Yingcheng Textile Co.,Ltd , https://www.sxyingcheng.com