I believe most would call the mother of pearl black but of course it has a grey to brown look about the triangular pieces in this ¾" square link. It has a geometric modern (mid century) look and they were made by Swank. In very good condition and are ready to be worn on any French cuffed shirt or blouse.
All my cufflinks and jewelry are sold in used, pre-owned condition. Vintage and Antique items by nature have some wear, imperfections and signs of use and age.
Square Silver Tone Dark Mother of Pearl Cuff links Cufflinks