Aquamarine is mainly found in the pegmatite deposit - sugar-granular sodium-long petrified pegmatite. The common crystal form is a hexagonal column, followed by a hexagonal double cone, and the aggregates are mostly columnar. Glass luster, transparent to translucent. The refractive index is 1.567-1.590, and the birefringence is 0.005-0.007. The pleochroism is obvious, from blue to blue-green. Hardness 7.5, density 2.68-2.80 g / cm3. Shell-shaped fracture. Does not emit light under X-ray irradiation. Good toughness. Aquamarine is far less precious than emeralds, but it has long been loved by people. It is considered to be a symbol of happiness and youthfulness. It also believes that it can give the wearer insight and make it a foresight. Some think it has the ability to hypnotize. If a population contains aquamarine, then he can be from hell. Summon the devil and get answers to any questions he wants to ask. He also believes that it has the power to suppress evil, enabling the wearer to defeat evil. Legend has it that a group of mermaids live in the blue sea. They usually use aquamarine as their own jewelry to dress themselves up. Once they encounter a critical moment, they only need to let the gemstones receive the sunlight, so they can get mysterious power to help themselves. . Therefore, aquamarine also has a nickname "mermaid stone", which coincides with the Pisces in March. Whether it is the East or the West, water is regarded as the source of life, and March is the time when all the creatures on the earth are active. Therefore, the aquamarine with the attribute of "water" is defined as the birthstone of March, symbolizing Being calm, brave and smart. Westerners generally believe that wearing aquamarine can make people have a foresight. With the development of science, people are no longer convinced that the birthstone has the magic of warding off evil spirits and bringing good luck. However, as a culture of precipitation and good times, the custom of wearing the birthstone will continue to spread. Aquamarine is the most effective crystal to improve the respiratory system, enhance expression, persuasiveness, planning ability, and protect the safety of travelers. It contains four elements: earth, water, fire and wind. It has powerful healing, purification and spiritual power. In the past, the aquamarine in the consumer's impression was generally cracked and contaminated, and was often processed into pendants, bracelets, and necklaces. In recent years, due to the improvement of exploration technology, new mining areas have been discovered, and many aquamarine gemstones with large heads, clean and dark colors have appeared on the market. In terms of price, the aquamarine is more cost-effective. The ordinary bead chain is calculated according to the bar or gram. The higher grades are calculated according to the carat. The price per carat is several hundred to several thousand. The large-grained aquamarine has a ring face. More than 100 carats, the price is several hundred thousand yuan. Although the popularity of aquamarine is not high compared to precious jewellery such as diamonds and jadeites, in recent years, as women's pursuit of jewellery has increased, cost-effective aquamarine has also entered the consumer's field of vision. The large aquamarine is processed and worn on the chest. It is very beautiful and attractive. Compared with other expensive jewellery, the affordable aquamarine is a good choice for many beauty lovers, but the aquamarine has a crisp texture. Care should be taken to avoid impact. The collection value of jewellery is reflected in its beauty. For aquamarine, weight, color and clarity are important factors. Generally speaking, the big, clean, and the closer the color is to the deep sea blue, the greater the appreciation potential. The tens of carats of the large ring face can be used as the first choice. This weight is not uncommon in the world. It is currently the largest in the world. The aquamarine crystal weighs 243 pounds. The aquamarine has good permeability and can be seen at a glance, except for the light blue aquamarine and the hot-processed aquamarine. After treatment, the color is deeper and better, but this processing does not affect the quality. Fading or reversal. The world's most famous aquamarine origin is in Brazil and Madagascar. Brazil's aquamarine is generally blue with blue, and Madagascar's aquamarine is mostly dark blue. A lot of things are like this. When there is much attention and the price increases, there will be imitation and counterfeit goods. The gemstones similar to aquamarine on the market are mainly blue topaz (mainly colored topaz), blue zircon, crystal, glass and artificial spinel. Among them, compared with topaz, the aquamarine has a small specific gravity, the amount of hand rubbing is light, and the aquamarine often has a light yellow-green color, while the blue-yellow jade that is colored is often purer and single. Compared with zircon, zircon has a large specific gravity, strong dispersion, and a radiant appearance, and visible double shadow. Compared with glass and artificial spinel, aquamarine often has a slight dichroism, and a gas-liquid two-phase inclusion is often seen in aquamarine. In the naked eye, aquamarine and blue crystal are difficult to distinguish. Identification key: the color blue is green, and the hand feels lighter. Since last year, the price of aquamarine with large particles and good quality has increased by 30%-50%, and the average has also increased by 10%. From a collection point of view, aquamarine is currently in a very embarrassing situation: whether it is jewelry or ornaments, it seems that there is not much collection value. There are many aquamarine deposits in the earth's crust. After processing into jewellery, the weight below 30 carats is particularly large, and there is no scarcity. It is expected that the repo market will not recover similar products. For the buyer, it is a beautiful dress for a while, it is impossible to maintain the potential of a diamond like 1 carat. For aquamarine above 30 carats, the volume is too large, it is not suitable for processing into rings, pendants, earrings and other jewelry, but the carvings are too small. From the Hong Kong jewelry market, the number of semi-finished aquamarine products above 150 carats is also very small. The products with weights between 30 and 150 carats are small in size after processing into ornaments. They are not neatly decorated. Light, practical is not strong. Once the jewelry has lost its obvious decorative effect and practicality, its collection value will be greatly reduced. 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