**18K Yellow Gold Tourmaline Ring – 4.31 ct Natural Tourmaline – Vintage Cocktail Ring – Size 64 (Ø 20.5 mm)** An elegant **18K yellow gold ring** showcasing a magnificent **4.31 carat natural tourmaline**. Featuring a timeless design with clean architectural lines, this vintage piece combines exceptional craftsmanship with the vibrant beauty of one of nature's most fascinating gemstones. The centerpiece is a stunning **4.31 carat natural tourmaline**, expertly cut to maximize its brilliance and color. Depending on the light, the gemstone displays an enchanting spectrum of rich green, teal, and subtle blue undertones, a characteristic that has made fine tourmaline one of the most sought-after gemstones among collectors. Its remarkable transparency and lively flashes of color ensure that the ring appears different from every angle. Tourmaline is renowned for possessing one of the widest color ranges found in the gemstone world. Formed deep within the Earth's crust over millions of years, each crystal develops its own unique color composition, meaning no two tourmalines are ever exactly alike. This individuality has earned tourmaline a special place in fine jewelry, where exceptional stones are admired for both their rarity and natural beauty. Crafted in **solid 18K yellow gold**, the ring offers a refined yet substantial feel on the hand. The warm tone of the gold perfectly complements the vivid tourmaline, creating a striking contrast that highlights the gemstone's brilliance without overwhelming its natural elegance. Whether worn daily or reserved for special occasions, this ring is both timeless and versatile. Its classic proportions and understated luxury make it an excellent choice for collectors of fine vintage jewelry or anyone seeking a distinctive gemstone ring that stands apart from more traditional designs. **Specifications** * Metal: Solid 18K Yellow Gold * Hallmark: 18K * Gemstone: Natural Tourmaline * Gemstone Weight: 4.31 ct * Cut: Faceted * Setting: Bezel / Open Gallery * Weight: 5.83 g * Ring Size (EU): 64 * Inside Diameter: 20.5 mm * Inside Circumference: 64.4 mm * Style: Vintage Cocktail Ring * Condition: Very good pre-owned condition with light signs of careful wear consistent with age. The tourmaline displays excellent brilliance, vibrant natural color, and attractive transparency, while the gold mount retains a rich luster. An exceptional **18K yellow gold tourmaline ring** featuring a vibrant **4.31 carat natural gemstone**, combining timeless craftsmanship with the unique beauty that has made tourmaline one of the world's most admired colored gemstones. A distinguished addition to any fine jewelry collection.