This premium-quality sapphire glass is has a hardness that ranks nine out of ten in the Mohs scale, making it the hardest material second to diamond. It is also designed to be anti-impact, anti-scratch, and with high electrical resistance, so it withstands the test of time. 

• Material: Sapphire Crystal
• Neat and clean appearance
• Feature: Maximum luster and excellent hardness
• Craftsmanship: High quality
• Vickers Hardness: 2000 - 2500 daN/mm2
• Optical properties: 1.760
• Available in customized designs
• This sapphire crystal glass is an ideal raw material for high-end watch designs.