no idea... maybe they get a red hot mineral crystal and dip it in some aluminium oxide, re-heat, cool, and polish?
sapphire coating on mineral glass?
I was just curious what this means:
"Anti-reflective mineral crystal with sapphire coating"
I saw that description on the speedway II.
Is that as scratch resistant as a sapphire crystal?
How do you coat a mineral crystal with Sapphire?
Just a quick question.
Any info would be appreciated.
"Anti-reflective mineral crystal with sapphire coating"
I saw that description on the speedway II.
Is that as scratch resistant as a sapphire crystal?
How do you coat a mineral crystal with Sapphire?
Just a quick question.
Any info would be appreciated.
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1 - 1 of 13 Posts
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