The diamond champagne is very used in jewelry(jeweler's store), in the form of pavement, to emphasize a bigger stone
Its color is caused by a plastic distortion. It is a deformation in the crystalline structure of the diamond that is in the form of disturbance in the alignment of the atoms of carbon and which gives a shape "waved" in the structure instead of right.
To know more about the mineralogy of the diamond champagne, to see mindat.org ->
See the article on the Diamond
