Pohoho 0 Posted June 18, 2011 Is there any way to differentiate glass from sapphire, without subjecting them to a destructive scratch test? Share this post Link to post Share on other sites
Wiz 0 Posted June 18, 2011 You can use a small electronic device called a diamond tester. You can find one either in the RWG shop or on the bay. Share this post Link to post Share on other sites
sconehead 5 Posted June 18, 2011 ...some used to say if the water beads in small droplets, it's likely to be mineral, big ones it's sapphire...dunno if it's true though... Share this post Link to post Share on other sites
Pohoho 0 Posted June 22, 2011 You can use a small electronic device called a diamond tester. You can find one either in the RWG shop or on the bay. Thanks Wiz for the suggestion, I was looking for a one off solution as I have a gift watch to put on sale in the future so if there's a way to be sure then that's extra selling point. Share this post Link to post Share on other sites
opus9 0 Posted June 22, 2011 Is there any way to differentiate glass from sapphire, without subjecting them to a destructive scratch test? Not being a watch expert alL i have to offer is refractive index..I would suspect that sapphire glass reflects / refracts at different wave lengths..so perhaps speak to ska..who has a UV light he may know far more than I. regards opus9 Share this post Link to post Share on other sites
NFleischer 4,355 Posted June 22, 2011 Someone once said they make a different sound if you tap them, not sure either. Share this post Link to post Share on other sites
JohnG 41 Posted June 22, 2011 Someone once said they make a different sound if you tap them, not sure either. Yup, have heard the following, but haven't confirmed them: Sapphire sounds different when you tap it. Bead of water test Color - they say mineral has a very slight blue/green tint to the end of the crystal where the cut part is visible above the bezel... Share this post Link to post Share on other sites
Nisv 0 Posted June 22, 2011 http://forums.watchuseek.com/f2/can-i-fix-...tml#post3431231 Check out post #14 there by Caneman, 2 simple Sapphire tests. Share this post Link to post Share on other sites
andygt 0 Posted June 22, 2011 Flick it. Plink noise = mineral Dull noise = sapphire Share this post Link to post Share on other sites
Wiz 0 Posted June 22, 2011 I tried all of these grandma tricks, and if I ended up buying a diamond tester, it's because they don't work. But it's no surprise, there are so many variables, from the AR coating, to the thickness of the crystal, not to mention that there are various qualities of sapphire/mineral crystals, and all the other stuffs in between like hardlex. Share this post Link to post Share on other sites
