How to distinguish between "crystal glass" and "glass glass"?

The aroma and taste brought by the crystal cup and the glass will be somewhat different, and the professional wine tasting will generally use the crystal cup as the main. So do you know how to distinguish between "crystal wine glass" and "glass wine glass?

How to distinguish between "crystal glass" and "glass glass"?

Generally speaking, the hardness of natural crystal is high: Mohs hardness is 7.0, which is difficult to process. Therefore, the vast majority of products called crystal cups are actually crystal glass products, which are relatively close to natural crystal products in terms of specific gravity, transparency and clarity. Since it is glass, it must be different from natural crystal. The former is amorphous and the latter is crystalline. Under the polarizer, the former appears full extinction, the latter will appear bull's eye interferogram.

The appearance of crystal glass and glass is very similar, but they are two completely different substances. The brightness of each angle of the crystal is different, and the brightness of each angle of the glass is the same. Scratch the glass with crystal, there are scratches on the glass, the traces will not be wiped, and the crystal will not be damaged at the same time; Scratch the crystal with glass, there are slight scratches on the crystal, but wipe it away, and the glass is damaged at the same time.