This is a signed, asymmetrical brooch by Monet in two-tone, silver and gold coloured metal.
The colours are bright and the shape is a rounded triangle, reminiscent of a guitar plectrum. It's a fairly heavy brooch that could also be used to pin scarves and so on.
It was made by the American costume jewellery maker Monet and is embossed on the back:
The copyright symbol was added to the name after 1955.
What condition is it in?
If you have any questions, just send an email to help@3bcshop.com.