These silver-tone studs feature an oval black stone, similar in style to formal vintage tuxedo accessories or onyx earrings. 

• Design: These items have a polished black stone bezel-set in a silver-colored frame.

• Purpose: They are designed for formal wear, often used as tuxedo studs or shirt studs for prom or other events.

• Materials: Similar products are typically crafted from silver tone brass, sterling silver, or lucite.