Vintage Sterling Silver Marcasite Mother Pearl? White Stone Jewelry Brooch Pin

This vintage brooch pin is sterling silver and a white stone that I believe is mother of pearl. Brand is unknown. It is marked 925. Great vintage condition. It is pre-owned and may have signs of wear. I see no visible damage to the brooch. It does have some yellowing around the stone. It is a charming piece of fine jewelry. Please review all pictures for more information on condition and measurements. Let me know if you have any questions. Thank you! B1/2

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