Star Sapphire and Diamond Brooch

Early 20th century star sapphire and diamond brooch, set with a large cabochonCabochon refers to a gemstone that has been shaped and polished with a smooth, rounded surface rather than cut with facets. The upper surface is usually domed, while the underside... More star sapphire, approx 10ct and two carats of old cut diamonds. Signed by Black Starr and Frost of New York.