Here is a brief description of rhodium. Image of a sample provided by Advent Research Materials Ltd . Rhodium metal is silvery white.
Rhodium has a higher melting point and lower density than platinum.
It has a high reflectance and is hard and durable. Upon heating it turns to the oxide when red and at higher temperatures turns back to the element. It is a major component of industrial catalytic systems such as the BP-Monsanto process. Here is a brief summary of the isolation of rhodium. It would not normally be necessary to make a sample of rhodium in the laboratory as the metal is available, at a price, commercially.