Garnet crystals are very similar in shape and color to pomegranate seeds, hence the name "Garnet". Ziya House is also called Ziya House, and it is also called Ziya House in Chinese jewelry industry. According to legend, its name comes from the ancient Arabic word "Wu Ya", which means "ruby". Garnet is called "purple tooth black" because of its deep red and purple color. Chemical composition: A3B2 [SiO2] 3 crystal system: it belongs to equiaxed crystal system. Refractive index: 1.74- 1.88. Hardness: 6.5-7.5, density: 3.5-4.3g/cm3. Origin: Sri Lanka, India, Madagascar, USA, China and other countries. Gem-grade garnet minerals have been found in more than ten provinces in China. There are many primary deposits in Ziyawu, mainly occurring in magmatic rocks or metamorphic rocks, and gem-grade garnet is mostly found in alluvial placers. Ziyawu is a garnet mineral and a silicate mineral with complex chemical composition, which is usually represented by A3B2 [SiO2] 3. Wherein a represents divalent cations such as Ca2+, Mg2+, Fe2+ and Mn2+, and b represents trivalent cations such as Al3+, Fe3+ and Cr3+. The crystal morphology is rhombic dodecahedron, quadrangular octahedron or a combination of the two. Aggregate is granular or massive. The color of garnet is influenced by its composition, showing a variety of colors, including red, purple, crimson, orange, yellow, green, brown and black. The crystal surface has glass luster and diamond luster, and the fracture surface has grease luster. Transparent to translucent. Isotropic objects are neither polychromatic nor birefringent. Garnet can be divided into almandine series (Mg-Al garnet, Al-Al garnet, Mn-Al garnet) and andradite series (Ca-Cr garnet, Ca-Al garnet, andradite). The difference between garnet and similar gemstones and synthetic garnet. Ruby, sapphire, artificial corundum, topaz, emerald, jadeite, etc., which are similar in color to various garnets, are all anisotropic and can be distinguished by a polarizer. It can be distinguished from density, inclusion, refractive index, dispersion and fluorescence. The difference between garnet and synthetic green garnet mainly lies in internal inclusions and density. The synthesized green gadolinium gallium garnet and yttrium aluminum garnet are uniform in color, flawless, with occasional bubbles, and appear red under the color filter. Density: Gd-Ga garnet 7.05g/cm3, Yttrium-Ga garnet 4.58g/cm3, far higher than natural garnet. In addition, refractive index and dispersion also have their own characteristics and can be distinguished. Evaluation and purchase of garnet. The evaluation and purchase of garnet are based on color, transparency and particle size. The standard requirements of gem-grade garnet are: good transparency, bright color and particle size greater than 5 mm. In the international gem market, pure and flawless garnet with bright color and crystal clear is of high value. Emerald Cr-V-Al garnet has the highest value, and its high quality can be compared with emerald. Red and orange garnets are also valuable. Purple tooth black is one of the common low-grade gems at present. The variety with rich and pure colors and high transparency is the best of Ziyawu. With high refractive index, strong luster and beautiful colors, it is a favorite gemstone variety. Many countries in the world regard Ziyawu as "the birthstone of January", which symbolizes loyalty, friendship and chastity. Westerners believe that purple tooth black has the magical effect of treating diseases and saving lives; In the Middle East, Ziyawu was chosen as a royal pledge. In geological museum, China, there is an orange-red garnet crystal, weighing 1397 carats, produced in Xinjiang. The National Museum of Natural History of the United States has the best brown transparent cinnamon stone (Fe-Ca-Al garnet) in the world. It is a beautifully carved head of Christ, weighing 6 1.5 carats, which is priceless. Features: Generally speaking, garnet crystals are not large, so they are usually made into rings or inlaid with small dice. Crystals are burgundy, orange and rare green garnet. Wine red garnet is deeper than ruby, and most of it is matched with silver in the market, which has a mysterious temperament. But like crystals, too small gems have small magnetic fields and little effect unless many are gathered together. Physiology: Red reminds us of blood. Garnet can stimulate blood circulation and hormone secretion to a certain extent, which is beneficial to the health of reproductive system and related organs and makes people lie down. Putting garnet on the coccyx at the lowest end of the dorsal spine can slowly feel its vibration, corresponding to the undersea chakra. By caring about the activation of the spleen, it can increase sexual ability and purify the spleen. But people who are sensitive to or unprepared for this practice had better avoid it, so as not to bring harm. It is said that it can also prevent snake bites and food poisoning. Just refer to it. Psychological function: it can make people have irresistible charm, attract happiness and eternal love, increase self-confidence, fight depression, help people face the traumatic memory of the past, interpret and understand it from another angle, and achieve a calm and happy situation. It can also increase people's inspiration when thinking, ward off evil spirits, and turn evil spirits into protective stones that are not infringed by external forces. -Related articles: What are the characteristics and spiritual functions of the yellow tiger eye stone? What are the characteristics and spiritual functions of lapis lazuli? What are the characteristics and spiritual functions of moonstone? 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