Sapphire is a natural fact. It is a natural cave that has changed gemstone diamond watch through the earth. It can be said that it is used on almost all diamond gemstone movements. If you trace its history, Westerners are the earliest pocket watch machine. The gems were not used at all on the core, but the mechanical friction generated by the watch at work was quickly found to cause wear on the movement components. At this time, the craftsmen thought of gems that were many times harder than the metal, but only At that time, people did not study gems very much. Many times they used natural gems instead, such as natural diamonds, natural rubies, natural sapphires, and some red gems, and gradually matured with the emergence of ruby and synthetic sapphire technology. After that, the cost was greatly reduced, and the synthetic ruby was used in a large amount on the watch movement. As for the so-called "never wear" mirror material that appeared in the advertisement, the colorless synthetic sapphire was actually used. Even today, watch crystals and sapphires are used in the watch industry, not It is only used on the movement. The high-end mobile phone adopts the technology of synthetic sapphire. For example, the panel material of VERTU mobile phone brand VERTU is synthetic sapphire, Diamond watch which is also this sapphire, not for others, wear resistance, of course, also to improve their value. . The main component of sapphire, aluminum oxide itself, is a colorless, transparent substance that appears blue when it contains iron womens diamond watches for saleoxide and titanium oxide. The sapphire mirror on the watch is a synthetic sapphire made of pure alumina at high temperatures. Because no other elements are added, the mirror will not appear blue, but transparent. Due to the high cost and high consumption of processing tools, the cost of making sapphire crystals is relatively high. Generally, sapphire crystals are used for high-end watches. watch. Its sealing, strength mens hiphop diamond watch and shock resistance are better than other materials. Therefore, the sapphire mirror has become an identifier for the top watch, and its price is of course expected. On the surface, the sapphire crystal glass is quickly spread out. The general situation is that when you take your mouth off the top of the crystal, it will spread out. When you look at the surface, you can't see the fog. Gently tap the surface with your fingernails. Remember, it must be light. If the sound is dull, it is the surface of the sapphire crystal. If it is ordinary crystal or glass, the sound will be crisper. Under certain conditions, a drop of water will be placed on the surface, then the surface will be erected, the water droplets will not spread out, and will slowly slide down. This is the sapphire crystal. This is because the mirror surface of sapphire is much smoother than the mirror surface of other materials, so the water droplets are not easily spread on the top, and other materials are scattered into one piece. So the jewels with diamonds are very luxurious. Condition: three-piece polished and brushed 18 K white gold case, sapphire bezel, starry diamond dial, sapphire hour markers, Cal.315 5 movement, 31 stone, four weights on the inside of the balance wheel, Baodi hairspring, dial, shell, double star drill, the movement are signed. The head of the white gold chain belt.