Thank you for contacting Mearto with your appraisal inquiry, and I apologize for the delay. This pin appears to be made of cast semi-precious metal. It is in good condition, and shows no damage or major wear. The stones are likely cubic zirconia or glass, and are set with an adhesive. Given the condition of this piece, and completed auctions of similar items, a fair market estimation is 30-40 dollars. Please reach out with any questions.

Bo Stuck