Big Bold Beautiful Bangle

Hi again,
This has got to be the hardest bangle in the world to photograph so I've photographed in it a couple of different lights to best represent it. Apologies for the shine bouncing off it; I may have polished it a little too vigorously.
I've posted it because I thought it was similar to one antiquerose posted but I'm not so sure now I've looked at them together. Similar layering of greenish/teal and brown and cut into an unusual shape that's actually very comfortable to wear. It's very light and didn't respond to Simichrome as Bakelite. I bought it in a charity shop and nobody could tell me anything about it; except the price. I almost picked this beaut up just by fluttering my lashes at it; it was that cheap!
Any input would be very welcome, as ever.
Thanks for looking.
Mand x