(1) Red sapphire is the most easily protected gemstone of colored gemstones. These two gemstones have high hardness, medium toughness and stable nature. They can be worn for a long time as long as they do not violently collide and avoid high temperatures. (2) Emerald is a brittle gem, and natural emeralds tend to be flawed and prone to rupture, so avoid strong crushing and collision. Immersion or incorporation of glue to mask the cracks in the crucible is a common method of treating emeralds. This kind of jewelry must avoid overheating. (3) Gold emeralds (including marbles and cat eyes) are gemstones with good hardness and toughness, and are therefore ideal male gemstones. It is generally only necessary to avoid high temperatures during the wearing process, especially when changing the style or repairing, do not let the flame directly face the gem. (4) Tourmaline is a kind of gemstone with soft luster, but the disadvantage is that the hardness is lower and the brittleness is stronger. Therefore, wearing jewelry made of tourmaline, should be careful not to rub against other gems, so as not to scratch. Tourmaline has thermoelectricity (the so-called tourmaline), which generates static electricity and absorbs some fine dust after being exposed to the sun or heated. Therefore, people working in a dusty environment should be careful to clean the gemstone with a neutral cleaning solution such as alcohol to keep it shiny and feminine. At the same time, tourmaline should also avoid overheating, because heat can sometimes change the color of the tourmaline. (5) Zircon and olivine cannot be placed together with other stones. Zircon and olivine are gemstones formed in the underground high-temperature environment. They are brittle in nature and have low hardness. Therefore, it is often difficult to make large gemstones due to too many cracks in the raw materials. The mutual friction between the finished gemstones also grinds the edges of the gemstones and causes the gemstones to lose "clearness". These two stones can't be heated, and heat will increase their brittleness. Olivine is also afraid of acid, and long-term contact with acidic substances will cause the surface of the gem to corrode and weaken its luster. (6) Topaz (topaz stone), moonlight gemstone should avoid collision, because both have cleavage, after the collision, the gemstone is easy to split in one direction and destroy all or part of it. (7) Spinel and garnet are medium-quality gemstones. Generally, you only need to be careful not to collide with each other. (8) Crystal should avoid contact with radioactive materials and try to avoid contact with heat sources. Crystals will change color under radioactive exposure (such as workers engaged in X-ray fluoroscopy), and amethyst may appear lighter when heated. 1U Server Chassis is also called the 1u rack-mounted Server Chassis. The rack mount is suitable for a 19-inch rack, U is a unit that represents the outside height of the server, and 1u means the height of the server chassis is 44.45mm. 1u server chassis is an important part of the server accessories. Its main function is to place and fix each server accessory, which plays a supporting and protecting role. In addition, the computer chassis plays an important role of electromagnetic radiation shielding. It is sconstituted a chassis shell, a bracket, a cooling fan, a hard disk connection board, a hard disk box, a panel, and an indicator light. 1U Server Chassis 1U Server Chassis,Rackmount Chassis 1U,Blade Chassis Servers,Short Chassis Server Dongguan Kaiwang Info Tech Co. Ltd. , https://www.case-kiwacn.com