For sale is a Beautiful Vintage Sterling Silver Faceted Amethyst, Natural Rough Quartz & Polished Fordite Necklace. This necklace is a beautiful piece and is marked 925 for sterling silver, and weighs 80.89 grams. This necklace is rare and unusual as it contains Fordite. And Fordite, also known as Detroit agate or Motor City agate, is a lapidarist term for polished pieces of finely-layered paint masses from automobile factories. The masses consist of automotive paint which has hardened sufficiently to be cut and polished. It was formed from the buildup of layers of enamel paint slag on tracks and skids on which cars were painted with acrylic lacquer, which have been baked numerous times. In recent times the material has been upcycled into jewelry.