4.76 Ct. Yellowish Green Tourmaline from Ceylon (Sri Lanka)

This natural tourmaline offered by The Natural Gemstone Company is a transparent radiant shape specimen weighing 4.76 carat, with precise dimensions of 10.43 by 10.42 by 6.77 mm. The cutting style is radiant, combining step like pavilion facets with brilliant crown facets to produce an optimized interplay of reflection and internal color. The color is best described as yellowish green with an intense color intensity, presenting a saturated face up appearance. Clarity has been evaluated at eye level as very very slightly included, indicating minimal feathering or pinpoint inclusions that do not detract from brilliance, transparency, or durability. The polish is excellent, contributing to crisp facet junctions and strong light return. Origin is Ceylon, Sri Lanka, and the specimen is natural with no enhancement, which is a critical factor for buyers and setters who prioritize untreated material for color stability and long term value.

From a lapidary perspective the radiant cut on this piece exhibits a disciplined facet architecture. The crown shows a classic brilliant arrangement with star facets directed toward a moderately sized table, calibrated to balance scintillation with color saturation. The pavilion incorporates truncated step facets that deepen the face up tone without causing excessive windowing, a deliberate decision by the cutter given the tourmaline chemistry and pleochroic tendencies common to many tourmalines. Symmetry is notably consistent across all girdle facets, and the girdle itself is suited to precision setting, being neither excessively thin nor overly thick. The pavilion depth of 6.77 mm supports a robust seat in a ring or pendant and preserves the stone profile when set in low bezel or high prong mounts. The excellent polish enhances facet brightness and maintains optical crispness in both diffuse and directional lighting, creating well defined light and dark patterning that jewelers can exploit in design.

This tourmaline adapts exceptionally well to a broad range of custom settings, with technical considerations to guide the jeweler. For a ring, a four to eight prong crown with reinforced corner claws is recommended to protect the square radiant corners, particularly if the piece is intended for everyday wear. A thin bezel will emphasize the outline and safeguard the girdle, while a full bezel will create a more contemporary, low profile setting that disperses impact energy away from the pavilion. Halo settings with single row pavé diamonds or colored accent stones such as tsavorite or chrome diopside will amplify perceived size and contrast the yellowish green hue, especially when accents are oriented to reflect light through the pavilion. Tension settings create a modern aesthetic, however exacting measurement of the girdle and table proportions is essential to ensure uniform pressure distribution and avoid edge chipping. For pendants and earrings, open back baskets permit light to enter the pavilion and maximize color vibrancy, whereas closed backs can mute color and should be reserved for deliberate design effects. Cabochon adjacent stones, cluster compositions, and invisible settings are all feasible, provided the cutter to setter tolerance for depth and faceting angles are respected.

For jewelers and knowledgeable buyers who will commission a bespoke piece, several technical recommendations will optimize both aesthetics and longevity. Align the table orientation to account for any pleochroic shifts, rotating the stone during mock up to select the face up hue that best meets client preference. Allow a setting seat depth that accommodates the 6.77 mm pavilion while leaving sufficient bezel height or prong engagement for secure mechanical hold. Select metals based on desired contrast and wear characteristics, yellow gold and rose gold will warm the yellowish green tone, white gold and platinum will provide cooler contrast and an emphasis on brilliance. Consider using milgrain or micro prong techniques on the halo to enhance perceived craftsmanship, and specify a girdle allowance when requesting settings such as channels or rail mounts. Because this tourmaline is untreated, avoid aggressive thermal shock during soldering and opt for localized heat control and protective flux techniques. For daily care, recommend gentle cleaning with warm soapy water and a soft brush, and advise cautious use of ultrasonic cleaners only after consultation with the setter, since inclusions classified as very very slightly included can be vulnerable to certain impacts. The Natural Gemstone Company can provide further technical diagrams and setting blueprints upon request, and offers coordination with experienced bench jewelers to ensure the finished piece exploits the stone geometry, maximizes color presentation, and preserves structural integrity over time.