Vintage Victorian Revival Onyx Diamond Vermeil Quatrefoil Brooch Pin
Designed as a quatrefoil, this brooch is made of gold over sterling silver and set with a real diamond at the center against a background of black onyx. The brooch measures 1 1/8″ square. The fiery diamond is estimated at 2.5mm in diameter.
This brooch is marked with a stylized letter r in lower case and sterling. It is in excellent condition.