Here are two very different chunky buttons. One is a coppery colour. It tapers up from the bottom and is then sunken down into the middle to show a swirly pattern. The outside has a linear design engraved on it. It is of some type of plastic I think and has a brass loop shank.
The other has a cream pearly centre with a gold coloured scrolly outer fitted over the shape. It has a metal shank and is rather unusual.