Cubic surfaces are a math model classic from the 19th century. We provide one of our favourite examples (cubic surface KM 42) in the form of a pendant. So, you may wear a high quality precious metal cubic surface!
The photo shown is the pendant in raw silver (not polished) on a black ground. As you may see from the photo, this is a very interesting option because it is much cheaper than the polished versions, and at the same time, the raw silver produces some very interesting light reflections.