Sapphire Crystal: To ensure the exquisite details of the watch can be fully appreciated, Omega employs scratch-resistant and anti-reflective sapphire crystal. Prior to machining and finishing, the sapphire crystal is produced using the Verneuil process (also known as the flame-fusion process). This method involves melting raw materials with an oxy-hydrogen flame and allowing the molten droplets to crystallize into a cylindrical form. With a Mohs hardness rating of 9 (on a scale of 1 to 10), the resulting sapphire crystal is exceptionally scratch-resistant and hard, ensuring superior visibility at all times.