1.62 Ct. Green Tourmaline from Tanzania

This 1.62 carat transparent green tourmaline from Tanzania offers a balance of measured proportions and precision cutting that appeals to technically minded buyers. The stone is presented in an oval outline measuring 8.41 by 6.35 by 4.58 millimeters, giving a length to width ratio of approximately 1.32, which sits within the preferred range for a classic oval that retains face up size while avoiding excessive elongation. The cutter employed a mixed brilliant cutting scheme, combining a brilliant facet arrangement on the crown with a modified pavilion geometry, to optimize internal light circulation for tourmaline refractive indices. Clarity is graded as very slightly included when evaluated at eye level, indicating only minor natural features that do not disrupt overall transparency. Color intensity is vivid, with a well saturated green that reads consistently under standard viewing, and the polish is excellent, with smooth facet planes and crisp junctions, reflecting the high level of lapidary finish that distinguishes material curated by The Natural Gemstone Company. No treatments or enhancements have been applied to this specimen, preserving the natural character and stability expected from untreated Tanzanian tourmaline.

The geometric faceting is intentionally calculated to maximize light play within the constraints of tourmaline optic properties. The mixed brilliant cut pairs a proportionally sized table and well defined star and kite facets on the crown with a pavilion composed of modified brilliant and elongated facets that create a network of return paths for incident light. The crown geometry favors moderately shallow crown angles to enhance scintillation, while the pavilion depth, at 4.58 millimeters relative to the stone average of length and width, produces a depth value of approximately 62 percent, a depth that contributes to strong return of light without producing excessive windowing or extinction. Facet junctions are executed with precision, maintaining facet symmetry across the oval outline, and the girdle has been controlled to a consistent thickness to allow secure yet low profile mounting options. These geometric decisions are informed by the refractive index range of tourmaline and by the mineral s modest dispersion, so the cutter concentrated on maximizing contrast and patterned brilliance rather than large fire, producing dynamic flash and controlled dark light areas that enhance perceived saturation.

Visually the gem presents a vivid, saturated forest green that displays balanced tone between medium and deep, suitable for both classic and contemporary settings. The mixed faceting enhances both overall brightness and localized scintillation, producing crisp flashes from the crown facets and deeper layered reflections from the pavilion. Subtle pleochroism, a characteristic of tourmaline, is managed by the cutter through orientation of the table and pavilion to deliver consistent face up color while allowing slight shifts in hue when viewed facet edge on, which can add complexity to the gem in jewelry. Given the very slightly included clarity at eye level, the stone will sit clean in typical ring and pendant configurations, and the excellent polish ensures minimal surface disruption to light entry and exit. As an untreated Tanzanian tourmaline with laboratory grade proportions and a masterful mixed brilliant execution, this piece from The Natural Gemstone Company is recommended for connoisseurs seeking a technical marriage of geometry and optical performance, and for designers who wish to exploit precise faceting to achieve maximum light play in medium sized colored gemstones.