What are these?

Left, EH, obsidian; middle, chalcedony

I have no idea and Id need to see em in hand to give an opinion.
It could be what dale said.

That center one actually looks like a piece of Rene Lalique glass from an old hood ornament on a Rolls.
The black one on the left, if you hold it up to a light, can you see translucency? If you rotate it in the light does it change color?
If it changes color its tourmaline, otherwise it IS volcanic glass like obsidian that has been tumpled and polished or cut, then tumbled and polished

The one on the right looks really soft, so Id guess some form of calcite or celestite or some kind of soft silicate thats been machine turned and roughly polished. Get a glass with a few inches of vinegar and gently place the far right one in the vinegar and tell us if it fizzes a biit. (If it does, take it out and wash it off cause its a carbonate of some kind (probably calcite).

Thanks for the reply.
The black one isn't translucent at all and doesn't change colour, from looking around it is most likely obsidian.

Still puzzled about the middle and right ones though. I put the right one in vinegar but it didn't fizz at all, the middle one looks almost cloudy inside and has a purple streak in the green area below.

*EDIT* Also, the black one has brown streaks through it almost resembling what you would see in a polished dark wood.

Any ideas?

Except, EH, obsidian is oft translucent. If you have another one like it that isn't as pretty, whack it. Obsidian will shatter like glass

It is glass

I never found vinegar very successful

vinegar will always causecalcite to bubble lightly, if it doesnt, powder it then vinegarie it , if it fizzes, that means it was actually dolomite.
If not, then its a silicate. It alway works dale.
I use hydrochloric acid 0.1 N in droppr bottle with a tight lid. Ive seen people spill HCl and burn themselves. With students I always hd them use acetic acid from the photo labs or vinegar from the supermarket.
Obsidian should be translucent, maybe its schorl tourmaline. Since all this stuff was either polished or cut an polished, I wonder if the black one isnt a piece of anthracite(they make really interesting sculpture from anthracite here in Pa coal country.
Although theres not too many places in US or Canada that even hve anthracite deposits