What is the purpose of the cups of water in jewellery displays?

Question

Those display shelves in jewellery shops.

Those display shelves in jewellery shops. When you walk past a jewellery shop, maybe you might notice those small cups of fluid placed beside the jewellery. Is it to prevent dust? Is it for decorative purposes (due to light reflection)? Or other..?

Answer 1

I wonder if it's vinegar, and not water... probably prevents tarnishing or something.

Answer 2

If you see, in the jewellery displays, the lights are bright & they produce heat. So to prevent the jewelleries on becoming too hot the water in the cup will evaporatate instead of the jewellereis becoming hot.

Answer 3

when i was small, i heard about this from friend...not sure if this is true..but apparently most friends around my age, all had known this

Those jewellery shops that had cups in display window, usually are those not major name shops..right.

The reason they had cups with water as they are rearing those xiao gui (small ghosts), who will entice u to walk to their display and take a look

Answer 4

Its not water. It's probably flouric acid. Harmless enough until it contacts glass. Such as when a display case is smashed, say in a robbery, then it goes to work dissolving the glass and releasing florine gas. It'll kill ya.
If it aint that then the clerk left their matini set and forgot about it.

Answer 5

in case you spot, in the rings reflects, the lights are impressive & they produce warmth. so which you would be able to ward off the jewelleries on growing to be to be too warm the water in the cup will evaporatate rather of the jewellereis growing to be to be warm.

Answer 6

This is to prevent static shock every time some one walks accross a carpet and touch the displyed items for viewing!

Answer 7

I don't know what you are talking about, but I know that if you put a real diamond in a cup of water the diamond becomes invisible. Maybe that is what it's for.

Answer 8

Why can't you just ask them!?