The weight of a gemstone is in carat (also known as card) Carat. 1 card is equal to 0.2 grams (gram). The light and precious gemstone is the charm of it.
Insiders divide 1 card into 100 points. If your gem is 50 points, it is half carat. The bigger the red or the blue treasure, the more rare it is and the higher the value. For example, a 1 card of red treasure, compared with a 2 card of the same quality of the red treasure, the price of a large car per carat will be several times higher than 2 times, because the 2 carat ruby ​​than 1 The number of carats is even smaller. The price per carat of high-quality red sapphires above 5 carats can be tens of times that of the same quality gemstones of 1 carat. This is the conclusion that things are rare. On the contrary, it is not difficult to find large jewels such as citrine, and the weight will not affect the price too much. Generally speaking, red and blue treasures below 10 points are the cheapest, half carats are much more expensive, and more than 1 carat is the most practical and popular, because it is suitable for individual ring, brooch or pendant, and the price is relatively moderate. . The demand for jewels in the 1-3 carat market is high, and it is affordable for many wealthy people. The high-quality red sapphires above 3 carats are worth a lot, and the high-quality red and blue treasures of more than 5 cards are even more important.
The relationship between the weight and value of Red and Blue is not as high as the world-recognized price standard, but it increases geometrically with the increase of weight. However, the price stability of diamonds is controlled by Debeers, and the price of colored stones often varies with the environment, production, and market supply. The price of top colored gemstones has steadily increased. Large red or sapphire, which plays an important role in the auction market.
At the same time, although China's color gemstone judging standards follow the diamond's "4C" standard (carat weight, clarity, color, cut), but because of the unique crystal structure of colored gemstones, there is a big difference with diamonds, industry experts suggest, appreciate and Pay attention to the following points when purchasing:
First observe the color. It is very important that the color of the colored gemstone is pure. For example, the color of the good sapphire should be like pure blue ink, and it is not mixed with other mottled colors.
Second, look at purity. Colored gemstones are different from diamonds. Under the microscope, each colored gemstone has impurities. As long as the naked eye does not see impurities, it is a colored gem with higher purity.
Finally, the purchaser can identify the gemstone through the jewelry ore identification agency if the buyer is not sure.
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