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SAPPHIRE CRYSTAL generally refers to synthetic sapphire, which is very different from natural sapphire, which is commonly understood as jewelry, and is generally used in the manufacture of watch mirrors. It and tungsten titanium alloy and high-tech ceramics are wear resistant materials. Although these materials can resist wear, but can not withstand strong impact, and some of the same or higher hardness materials (such as: grinding stones, sandpaper, nail files, granite, concrete walls and floors, etc.) may scratch the surface of these materials.
Sapphire glass is a generic name for corundum gems in addition to red rubies and other colors, and the main component is alumina (Al2O3). Sapphire glass refers to synthetic sapphires that can be easily and cheaply produced in the laboratory as gem-grade sapphires with the same chemical composition and physical properties as natural sapphires.
