Antique gemstone

Hello I’ve just found these Gemstones which I’ve not spotted and cleaned, I think I need to clean them, I’ve no idea what they are or how old or what kind of jewellery they came from. Could be from something antique so stones could be anything, I always just assumed non diamonds got tossed out. I’ve just noticed this and was looking at rings on Lang and saw stones like this in Art Deco jewellery, not weighed it yet, looks like it could be something decent