Vtg Antique Art Deco Signet Black Onyx & Diamond Ring 10k P Gold Mens Sz 13. Approximately 6g total weight. I am going by what my postage scale shows, so I am not sure of how accurate it is for such a light weight. 

Please note photos carefully to confirm. I found this in my mother's old jewelry box. I think it belonged to her stepfather. It doesn't seem like he wore it at all. I soaked it in some warm sudsy water and gave it a gentle scrub with a soft brush, and added a new, velvety jewelry gift box. 

The Vtg Antique Art Deco Signet Black Onyx & Diamond Ring is a vintage piece with a unique Art Deco style. Made of 10k yellow gold, this ring features a black onyx main stone in a square shape with a single diamond accent. It has a retro design and is suitable for various occasions such as engagements, weddings, anniversaries, and birthdays. The ring is signed and has a prong setting, making it a statement piece for men's fashion. Made in the United States during the Retro era, this ring is a special addition to any jewelry collection.

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