Does anyone know anything about gems?

I bought a beautiful silver necklace for less than $30 and it has lots of gemstones. The necklace looks like it was handcrafted and very amateurish, but the stones are very nice. Does anyone know anything about stones or know of a blog where I can get help, please?

I am interested in identifying the stones that fluoresce under black light.

There are 3 green stones, but one of them reacts to black light.


There is this pink stone and under black light it behaves almost like a ruby ​​when lit.


This blue stone and two others have a slight but noticeable reaction to black light.


First of all, check if the stones are cold.

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