Vintage Duri art deco earrings 1.5"

Mother of pearl shell and gold. no stamp anywhere about the gold, I'd assume it's costume brass, however these haven't tarnished in 20 yrs of storage. brass would tarnish.. 1.5" long pair with 2 other items to get 20% off I found this online: Located in New Jersey, Duri is currently a well known provider of jewelry service in Plainfield. Incorporated in the 1960s, the company known for high quality handmade costume jewelry ceased to exist in the 1980s. Produced in 1960-1980s decorations represent beautiful Art Deco & Art Nouveau revival pieces. The design feature of this brand is geometric shapes, clean lines, art deco and modernist style, as well as the use of abalone shells and mother of pearl along with pewter and alloys of silver and gold tone. Thanks to this, handmade jewelry of this brand has a specific, characteristic and easily recognizable style. Also, vintage decorations of this brand are quite rare, and have a collection value that will increase every year. Traditionally, the markings on the back side of each product include Duri brand name with copyright sign.