-Vintage Louis Roth Silver-Tone Genuine Onyx Cufflinks & Shirt Studs Set. -Genuine Onyx with silver-tone backings. -Never worn. NOTE: I have been collecting a wide variety of mostly higher-end jewelry for many years through estate sales, consignment shops, flea markets, thrift shops, online auctions, and inheritances, and I am knowledgeable about vintage, fine, and fashion jewelry. I test all stones, gemstones, silver, and gold, and although there can be times I make a mistake, I apologize in advance as researching some of these pieces can be tedious and errors are sometimes made. VINTAGE JEWELRY: All vintage jewelry is used and is 20+ years old and antique jewelry is 100+ years old, and will, at times, show normal signs of usage. Patina, slight flaws, and dulling of stones are all part of a vintage character. Please be assured I will do my best to point out any flaws if there are any. Jewelry should be your best friend! Take good care of it! Thanks!