re: OT Watch Guru thread: help needed with casual watches

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Everybody is using sapphire now.

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From my experience... lot of watch companies advertise 'sapphire crystal' or 'super-hard crystal' watch faces, but many of those watches still got minute scratches with everyday wear. Despite the Mohs index rate sapphire as a 9.

However, the higher-end Swiss watches that I got (Rolex, TAG, Breitling, and Longines) manage to avoid getting scratched.

My watch-person said that not all 'sapphire crystal' are the same, and that there is a molecular binding process during manufacturing the sapphire that make them more scratch resistant by binding the surface of the crystal with lubricant so that scratchable objects will glide off the crystal instead of scratching...