This beautiful Vintage Brooch was in my familys estate items. I believe the center stone to be a Cabochon, rhodochrosite (natural). You can put it up to the light, and it is translucent.
The measurements on this item are: A little over 1 1/2" wide X 1 1/2" tall. (see pics) The stone in the middle is a little under 1" tall X 1/2" wide. (see pics)
The metal looks to be made of an antique gold. The clasp in in excellent shape. The smaller stones look to be tourquoise and pearl.