Gilded silver brooch with three rhinestones

Gilded silver, cut glass stones. Total weight 4.85 grams. Rectangular in shape, with arched side edges. Decorated ( on the front ) at the edge with an engraved line. Embossed symmetrical arched ornament on the front, in a combination of polished silver and gilded silver, with a shamrock ornament. In the middle, three cut glass stones in crowns. Arched handle with a needle. Marked: Prague Austro-Hungarian hallmark for foreign goods ( letters AV, letter C. ) . Central Europe 1868 - 1890. Length 5 cm.