3.15ct Brazilian Paraiba Tourmaline & Diamond Ring | Gubelin

Carat Weight: 3.15 ct. Tourmaline | 76 Diamonds = 5.07ctsColor/Clarity: Electric Neon Blue / Diamonds E-F VS+ (2 MQ GIA)Certifications: Gubelin and AGLSize: 6.0Creator: Spectra Fine JewelryMetal: 18K White GoldWeight: 8.39 gramsPeriod: ContemporaryCondition: New/Excellent A property of exceptional mineralogical rarity, this high-jewelry masterpiece centers on a remarkable 3.15-carat cushion-shaped Parai­ba tourmaline of definitive Brazilian provenance. The importance of this specimen is marked by the Gubelin Gem Lab, which has honored the stone with a complete, hardcover Gubelin Gemmological Profile book alongside its certificate, a prestigious distinction reserved strictly for museum-tier gems of singular importance. Furthermore, the stone has achieved an "Excellent" Gemstone Rating of 89.1 Points, independent validation of its extraordinary visual salience and body color. The tourmaline exhibits the intensely vibrant, copper- and manganese-bearing "neon" blue hue that historically defines the premier, classic deposits of northern Brazil. Under laboratory magnification, the modified brilliant-cut gem displays fine micro-growth tubes characteristic of its premium geological origin. The center stone is structurally secured within an architectural framework of 5.07 carats of fine white diamonds graded as E-F color and VS+ clarity. This imposing cluster configuration features a continuous mosaic of marquise-cut and round brilliant diamonds, anchored by two prominent GIA-certified marquise-cut diamonds along the shoulders that direct light seamlessly toward the pavilion. The hand-assembled mounting reflects the absolute pinnacle of contemporary bench-work, executed in solid 18K white gold with a gross weight of 8.39 grams. The undergallery is engineered with an intricate, openwork double-gallery structure that optimizes the light paths entering the gemstone while allowing it to sit elegantly low to the finger. This fine basket tapers into a heavy, multi-row split shank meticulously pave-set with brilliant-cut diamonds. Laser-inscribed internally with its precise component weights, this singular ring represents an important acquisition opportunity for collectors of the world's finest neon gemstones. Ref. :R1804