Vintage Black Onyx Cufflinks by Sarah Coventry – The Jewelry Lady's Store
A PAIR OF 14K GOLD AND BLACK ONYX CUFFLINKS, circa 1970 and another pair of 9k gold and black onyx cufflinks. Approx weight 14k cufflinks 12.4g. Approx weight 9k cufflinks 8.5g (2)
Vintage Tiffany & Co 18k Gold Onyx Cufflinks Stud Set – Oak Gem
Vintage Tiffany & Co. Onyx Column Cufflinks
Black Onyx Antique 1930s Art Deco Cuff Links Vermeil Gold - Etsy New Zealand
Vintage Black Onyx Cufflinks - The Vintage Jeweller