This striking piece of jewellery resulted from a special request to have a pendant containing a haematite (hematite) of a certain minimum wieght and and a minimum quantity of silver and iron.
The result is a geometric design with two iron rings, one either side, to get the necessary weight with a white metal triangle and stone bezel. Formally because of the mixed metals, it cannot be assayed and hence the formal description of the triangle is white metal, though it was constructed with standard sterling and fine silver stock.