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Thread: Why do companies use mineral glass?

  1. #1

    Why do companies use mineral glass?

    I have never understood why companies switched from plexi to mineral glass crystals. Acrylic is cheaper, looks better IMHO and you can polish scratches out. Why did companies switch? I understand sapphire but I can't figure out mineral glass.

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  3. #2
    Cost (when compared to Sapphire)
    To make watches thinner (when compared to Plexi)

    (imho )

  4. Likes Little Big Feather liked this post
  5. #3
    Used to be a selling / marketing ploy back in the day "scratch resistant mineral glass" Oooohhhh wow, really? Actually, it can be argued that there are some pro's: less likely to shatter compared to sapphire and more scratch resistant than plastic.

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  7. #4
    But because of the doming usually built in one could argue that the plexi's are tougher to an extent.

    But when bash comes to bash you'll break all of them

  8. #5
    Moderator - Central tribe125's Avatar
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    Oct 2014
    Kent - UK
    It's mostly just cranky enthusiasts like us that like plexiglass, most watch buyers will regard it as cheap and old-fashioned.

    The same buyers probably won't distinguish between sapphire and mineral but would be quick to say "It's plastic? 500 and it's plastic?!" if the salesman pointed it out.

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  10. #6
    Member rfortson's Avatar
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    Dec 2014
    Houston (Clearlake) TX
    In my experience, mineral glass is the worst of both worlds. I scratch it, but I can't polish it. I haven't scratched sapphire, and I can easily polish acrylic. Mineral glass isn't a deal killer, but it's not high on my list of good things.

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  12. #7
    I have a couple of vintage pieces that have mineral glass but on a new watch it is a deal breaker for me.

  13. #8
    Member Perseus's Avatar
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    Nov 2014
    Denver, CO
    I think it's only because it's cheaper than sapphire.

  14. #9
    The Dude Abides Nokie's Avatar
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    Nov 2014
    Northern CA
    Easy to correct any scratches, but I always prefer sapphire and it is a deal breaker for me too.
    "Either He's Dead, Or My Watch Has Stopped....."
    Groucho Marx

  15. #10
    Oft mentioned in Seiko threads mineral glass is the BEST choice. For me mineral glass is just a cost compromise, plexi and sapphire make much more sense depending on the intended use.
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