The Art star pin above is studded with colorful rhinestones. This style originated in Paris, France. Art Deco pieces are characterized by geometric lines and angles, with very few curves. This art movement eventually became bolder and evolved into Art Moderne. Louis Comfort Tiffany made archetypal Art Nouveau pieces.
Pieces purposely look hand-made, incorporating hammer marks and simple cabochon settings.
The Arts and Crafts movement also revived the art of enamel. An assay is a test of the purity of an alloy. A tiny piece of metal is scraped from the piece and the percentage of gold or silver is determined. Official assay offices determine whether a piece qualifies for an appropriate hallmark . Asscher worked in Amsterdam.