Featured Interesting gold stone/glass bracelet

I bought a huge box of jewellery for a fiver at the car boot sale. Mostly scrap but a few gems including this bracelet. To begin with I thought it was costume. (obviously whoever put it there did too even though I don't think they had a clue what was in the box as this was in the filth at the bottom) One of the links is covered in verdigris and the metal is deteriorating. I was a bit slow on the uptake to realise that it was only the one link and when I looked closer it has had a bad repair and that one link has been replaced with base metal. All the others are stamped for gold on the rings. There is also a bit of random base metal chain added.
I am really interested to know about the gems. I thought glass to begin with but now I'm not so sure as look a bit like stone?. Seems a mish-mash of gems. The gold leaf bit seems to be layered on top.
It is filthy and needs a good clean in order to even attempt to study the hallmarks.
Any tips on cleaning something like this- do you think it's ok to give it a gentle scrub with dish washing soap and a toothbrush?. When it's clean I will test the gems too.
Love to hear any thoughts on this please.
Thankyou

 

Appear to be glass.
Not silver as I see verdigris

 

Agree they look like glass tiles. But all slightly different sizes & shapes, so wonder if they were represented as having an unusual origin, something that way. I see no reason not to give it a wash & brush.

 

Tests as gold except for the one with the replacement surround (photographed balanced on the others)

 

One of the joys of buying a box of items then finding something really interesting hidden at the bottom.

 

I'd give it a vinegar soak. It won't hurt the gold or the glass and it'll get the crud off. I'l lay odds it's Italian.

 

Looks like it could be a real find. I usually soak things in warm water with a little dawn. Soft toothbrush if needed. Would love to see it cleaned!

 

Home from work now so I'll get onto it this evening. Thanks everyone.

 

Stamp as promised. Looks like a pair of scissors or a small dancing person!. Any ideas please anyone? @DragonflyWink ?

 

@Any Jewelry ,any thoughts on the hallmark please?. I'm drawing a blank.

 

I think it is a maker's mark, rather than a halmark.