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| Joined: | Thu Apr 16th, 2009 |
| Location: | Arctic, Norway |
| Posts: | 5821 |
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Great tip Mark...another that an old watchmaker showed me years ago when I collected vintage is if you hold the watch against your cheek and it feels cold it was a glass crystal, if it was warm it was plastic
Thrue! Supposely because the high density does that the material don't absorb heat easyly.
Still, a mineral glass feels cold...Mineral glass is just usual glass who's hardened so it's not as hard as sapphire glass but it feels cold. The drop of water will spray on mineral glass: Not on the sapphire.