By Frederik Drost

Crystal Sapphire crystal is a type of watch glass that is made from synthetic sapphire, a crystal form of the mineral corundum. This type of crystal is known for its extreme hardness, making it highly scratch-resistant. Sapphire crystal is also highly transparent, allowing for maximum clarity of the dial. In addition, sapphire crystal is also very resistant to temperature and chemical changes, making it a great choice for a watch glass.

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