Thank you for contacting Mearto with your appraisal inquiry, and I apologize for the delay. This brooch is made of stamped and riveted semi-precious metal. It was plated after its construction. The stones are likely cubic zirconia, or glass. The piece is in good condition, with light wearing of the plating on the back side, and all of the stones and stone-settings are sound. Given the condition of this piece, and completed auctions of similar items, a fair market estimation is 55-65 dollars. Please reach out with any questions. Bo Stuck
