gold brooch wit aquamarine, diamond and tourmaline

An 18 carat gold square brooch decorated with gold triangles arranged upright, and in a circle, with at the center 4 oval cut aquamarine and one oval cut emerald arranged in a cross.(app. 0.25 carat), and in between are 4 brilliant cut diamonds (app. 0.28 carat) with the signature and master mark for Jacob de Groes, Netherlands.

weight: 33.47 grams
dimensions: 3.8 x 3.8 cm