This identified colorful set is a 1950s Selro-Selini japanned (black finished) metal pinwheel brooch and clip back earrings set with round prong-set rhinestones in green, yellow, pink and red.
Dimensions: brooch, 2 x 2 x 0.38 inch; earrings, 0.75 x 0.75 x 0.5 inch