This antique Victorian 10k yellow gold pendant necklace features a 2-inch pendant with a .02-carat Old European cut diamond at the center, surrounded by a black onyx circle.

The Old European cut is an early diamond cutting style from the 1800s that produces a softer, more subdued sparkle compared to modern brilliant cuts, with a smaller table and larger facets that create distinctive chunky flashes of light.

Five seed pearls (1.95mm each) accent the pendant along with carved leaf details characteristic of Victorian-era jewelry from the 1830s-1900s. The black onyx creates strong contrast against the gold and highlights the diamond's sparkle. The 18-inch chain closes with a spring ring clasp. The 10k gold has developed a warm patina over more than a century of wear.