This is a Cartier silver-gilt buttonhole brooch in the shape of a scallop shell. It was designed for the 15th anniversary of the Shell brand and is decorated with a ruby. Designer: Cartier. Made in France, Paris. Fully hallmarked. Comes in an original Cartier box. Dimensions - 1.5 x 1.2 x 0.6 cm Weight : 2.12 grams Ruby - Cut - round brilliant Carat weight: 0.7 ct. Treatment is not indicated. Condition: Brooch is pre-owned, minor signs of usage, good vintage condition overall.