A beautiful and excellent piece, you can feel the quality in your hands. The cut of the crystal glass is so well done! The stones have a color change effect as the piece is moved in your hands changing from light pink to lavender! In fluorescent light, the brooch color is powder blue see photo showing blue brooch, daylight it is purple/ lavender. I have yet to find information on it, seen only one other for sale over years of searches for beautiful vintage and antique pieces of costume jewelry. Not signed.