Nine Blue Gem mine turquoise stones are arranged in a circle with a stone in the center All are bezel set. The largest stone is 1/2". The sterling brooch/pendant is 1 3/4" by 1 1/2". There is a sturdy safety clasp as well as a bail with a 3/16" opening. Marked D S, the D being smaller than the S, for Dorothy Secatero, a Navajo. Blue Gem turquoise are known for their vibrant color. Excellent vintage condition. I have added a newer sterling collar ring for you to wear it as a necklace.