An American Heidi Daus costume jewelry set of a necklace and earrings. The necklace is made of clear brown faux gemstones in a beaded design. The necklace is adorned with a pendant. The pendant and earrings are made in a swirl design. encrusted with faux diamonds. Marked, China Heidi Daus, on the back side. Heidis pieces are highly collectible and sold in 20 countries around the world. A pioneer and leader of the statement jewelry concept, since 1981 Heidi Daus has created some of the worlds most spectacular pieces of jewelry. Vintage and Modern Designer Costume Jewelry For Collectors.