Product Details

Calling all serious antique enthusiasts, historical hallmark collectors, and UV glow hunters! This spectacular Edwardian / Early Art Deco Statement Ring is a rare, museum-worthy treasure featuring a flawless emerald-cut green center stone flanked by bright white topaz side accents. Under normal lighting, the center stone shows an elegant, soft pastel-green hue. However, under a UV blacklight, it completely transforms into a blazing, electric neon-green masterpiece! Ostby & Barton famously utilized these magical UV-reactive stones (such as antique uranium glass or fluorescent spinel) inside their premium gold settings. The inner band features a crisp, distinct "OB 10K" hallmark, confirming its production by the legendary jewelry firm of Providence, RI. The firm’s co-founder, elite jeweler Engelhart Cornelius Ostby, tragically lost his life on the Titanic in 1912, making any signed piece bearing this mark a deeply coveted piece of wearable history.