What is sapphire crystal used for?Typically in the luxury watch field nowadays, sapphire crystals are preferred. Sapphire is extremely strong and scratch resistant, making it the top choice for a fine timepiece. While sapphire is the more expensive of the three crystal (Mineral,Acrylic,Sapphire) choices, it has its advantages due to the scratch and shatter resistance.Following is a chart for your reference when you consider the size and waterproof:
