This is an exceptional example of Mid-Century jewelry, featuring a masterfully hand-finished "Fishtail" setting in solid Platinum. The setting utilizes a sophisticated "bright-cut" technique where the metal is carved into flared, triangular shapes. This not only secures the stones but also squares off the round diamonds visually, creating a significantly larger "face-up" appearance. ​The Diamonds The ring is set with 16 Early Modern Round Brilliant diamonds (Transitional cuts). These stones feature the classic 58-facet pattern with sharp, pointed culets, delivering the fiery brilliance of a modern diamond with the authentic character of a vintage piece. ​Visual Impact: Due to their specialized shallow spread (1.5mm depth), these 3mm diamonds provide the visual presence of a 2.00ct+ band, while maintaining a sleek, comfortable low profile. ​RARE Geological Feature: Green Fluorescence A standout feature of this particular piece is that 10 of the 16 diamonds exhibit rare neon green fluorescence under UV light. Green fluorescence is a rare phenomenon in natural diamonds (occurring in less than 1% of stones) and serves as a fascinating "geological fingerprint" confirming their natural, earth-mined origin. ​Specifications: ​Metal: Solid Platinum (tested; 5.10 grams) ​Total Diamond Weight: Approx. 1.31 carats ​Diamond Size: 16 x 3.0mm Round Brilliants ​Ring Size: UK P / US 7.75 / EU 56 (Internal Diameter: 18.0mm) ​Profile: Low-profile fishtail setting (approx. 1.5mm height off finger) ​Condition: Very Good vintage condition with a light natural patina.