Garnet is a beautiful ore with the mellow and charming color of aged red wine. It is one of the most popular gemstones for women. Garnet is a large family, which can be divided into two series of six varieties: 1 aluminum garnet, including magnesium aluminum garnet, iron aluminum garnet, manganese aluminum garnet; 2 calcium garnet, including calcium aluminum garnet, calcium Iron garnet, calcium chrome garnet. The density of garnet is 3.5-4.3g/cm3; its hardness is large (6.5-7.5), its refractive index is high (1.74-1.89), its gloss is strong, and its color is beautiful. It is a modern gemstone. Magnesium garnet and garnet are the most common gems.
The value and evaluation of different varieties of garnet
Garnet has different economic value depending on color and transparency. The main factor is color. Among them, emerald green calcium garnet and chrome vanadium calcium aluminum garnet have the highest value. The price of transparent martial arts is equivalent to that of emerald. rarely seen. Followed by red magnesia-alumina, orange-yellow manganese-aluminum garnet is popular. If it has a brown hue, the value will decrease. Translucent calcium aluminum garnet, used mostly for jade, has a lower value.
As for the quality requirements of garnet, it is still different. The total requirement for gem-quality garnet is that the color is rich and uniform, the gloss is strong, the transparency is high, and there are no cracks and other defects. However, the specific requirements for different color varieties are different. For red varieties, the best color is blood red, the second is pure red, reddish, rich red, purple red; for green varieties, the color is emerald, followed by green, light green, yellow green and so on. The particle size requirement for garnet should be greater than 5mm, especially for those with good quality.
The origin of garnet is very extensive, especially the garnet in China is more prominent. China has been in Xinjiang, Gansu, Qinghai, Shaanxi, Liaoning, Jilin, Heilongjiang, Inner Mongolia, Shanxi, Hebei, Henan, Shandong, Jiangsu, Zhejiang, Fujian, etc. 24 The provinces (autonomous regions) have discovered garnet deposits, some of which have met gem-quality requirements, while the garnets produced in Xinjiang and Jiangsu provinces (autonomous regions) are more important.
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