https://doi.org/10.1117/12.960761 https://doi.org/10.1117/12.960761 TLDR: Sapphire is weaker, the optical finishing process is longer and more difficult. Sap

https://doi.org/10.1117/12.960761 https://doi.org/10.1117/12.960761 TLDR: Sapphire is weaker, the optical finishing process is longer and more difficult. Sapphire however exhibits less optical distortion