How to identify watch glass lenses?

How to identify table glass? Currently use watch glass has 3 kinds: organic glass, quartz glass and sapphire crystal glass. Confusingly, and easily distinguish is quartz glass and sapphire crystal, both in quality and price difference. Sapphire,

How to identify table glass? The world biao168 renown

Currently use watch glass has 3 kinds: organic glass, quartz glass and sapphire crystal glass. Confusingly, and easily distinguish is quartz glass and sapphire crystal, both in quality and price difference. Sapphire crystal glass once said stone "never wear glass, glass" instead of "easy wear. It's the price for the ordinary quartz glass, therefore, only a few times before use of high-grade watch on sapphire crystal.

In no testing instrument, under the situation of a simple method can be used to distinguish between ordinary quartz glass and sapphire crystal glass. A drop in table glass plane, then will they made a ball, all water is not represent a sap

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