1.78 Ct. Tourmaline from Nigeria

This rare, transparent 1.78 carat Nigerian green tourmaline from The Natural Gemstone Company is a gem for the collector who values natural beauty and uncompromised provenance. Cut into a precise radiant shape with dimensions of 8.53 x 5.84 x 4.35 mm, this stone displays an intense, saturated green color and an excellent polish that produces lively brilliance across its facet planes. Graded eye clean at eye level, this tourmaline is free of visible inclusions that would distract from its vivid hue, and, importantly, it is untreated with no enhancement, preserving the stone’s authentic character. The proportions give an ideal depth of approximately 60 percent, a balance that maximizes light return and ensures the face-up presence of this gem reads larger than its weight alone would suggest. Each facet has been cut to highlight the tourmaline’s internal fire and color zoning, making this piece a singular example of Nigeria’s finest green material and a scarce opportunity for those seeking something truly exclusive.

Because of its elegant rectangular radiant cut and desirable size, this tourmaline is particularly well suited for bespoke jewelry design. At 1.78 carats and measuring 8.53 by 5.84 mm, it is an ideal center stone for a custom engagement ring, a striking cocktail ring, an exquisite pendant, or a refined men’s signet. The radiant cut’s clipped corners and brilliant faceting allow for versatile mounting options, from classic four-prong and bezel settings that protect the corners, to a modern east-west orientation or a halo arrangement that amplifies color and visual impact. Pair it with warm 18k yellow gold to enhance the green’s warmth, with white gold or platinum for a contemporary, high-contrast look, or with rose gold for a fashion-forward statement. Limited in availability and possessing a combination of size, shape, and untreated origin that is rarely found together, this Nigerian radiant tourmaline is an invitation to join an elite group of owners who commission truly bespoke pieces. Contact The Natural Gemstone Company to reserve this unique stone and to discuss custom mounting options, hand-selected complementary accents, and a design tailored to make this exceptional tourmaline the focal point of a one-of-a-kind jewelry creation.