This transparent watch components is made by sapphire crystal. It 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. 

• Material: Sapphire
• MOQ: 100+ pcs
• Coating
• Color: Transparent, customized
• Anti-scratch, anti-corrosion, anti -impact
• Hardest substance second to diamond 9 MoHs
• Extremely high melting temperature 2030 °C 
• Layers: 3~10 layers
• Single side OR both side
• Hard coating
• Electroplating / Metallization
• Welcome to ask/inquire some details/another of any color and effect of coating and metallization.