I just love geometric designs but do not see a lot of jewellery in good modernist shapes. This brooch is not an expensive one - made out of relatively cheap material - in grey, red and black. Probably made by hand. It is just that the design is - in my opinion - so good. (not sure of the material or the age).
Resin Geometric Brooch - Red Grey Black Triangles I would be happy to wear it. Wish I could find more like it. Price £38 reference 3004 C39/36