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Old 20 May 2009, 07:37 PM   #3
Singslinger
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Join Date: Sep 2008
Location: singapore
Posts: 6,422
I'm no expert by any means, but I believe a lot of things can scratch a sapphire crystal, not just the materials you listed. I reckon a lot depends on the force applied. Sorry to hear about the sratch on your Sub though.
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