Amethyst and diamond brooch, central octagonal step cut amethyst, estimated weight 21.61 carats, surrounded by an ornate old cut diamond set border, estimated total diamond weight 4.13 carats, pin and catch fitting, mounted in silver, 15 ct and 9 ct, 4.5 x 5.2cm. CONDITIONGross weight 17 gramslargest diamonds estimated weights 0.78 carats, 0.69 carats, 0.42 carats and 0.35 caratsEstimated colour G-IEstimated clarity Vs- IDiamond mounts testing as silver and 15 ctAmethyst and mount is a later addition and mounted in 9 ct with higher plating