Featured Help with 3 pieces of jewelry

Hi all was hoping for some clarity on the 3 items.
First one what sort of stone
Second not sure on type of metal all separate pieces not magnetic not silver or gold scratch test doesn't show copper or brass clasp is silver very heavy
Third is a ring I was just after comments on please is silver and marked insode and pretty bulky thanks chris

 

The green stone could be a tourmaline.

 

The green stone is difficult to tell from the photos. It could be anything from glass to chrome diopside.


The bracelet is Modernist, probably Italian with that clasp. There is a mark on the clasp, this tiny indentation:


The stone in the last ring is probably CZ.

 

Thanks as always. The clasp says 925. Appreciate the modernist term had something to Google and similar items came up appeciate it chris

 

Just a quick one I gather thos is an abalone piece. It' on a necklace

 

Yes, a fragment of abalone shell.

 

Second that.