1.10 Ct. Bluish Green Sapphire from Montana

This listing presents a precision worked 1.10 carat transparent sapphire from Montana, rendered in a triangular trillion shape with exact dimensions of 6.71 x 6.78 x 3.70 mm. The measured pavilion depth yields a depth to average diameter ratio of approximately 54.9 percent, a proportion that supports efficient light return while preserving strong color saturation in bluish green material. As a member of the corundum species, this sapphire exhibits a refractive index range typically near 1.762 to 1.770 and a specific gravity in the range of about 3.98 to 4.06, factors that contribute to notable brilliance and weight retention for its table size. The piece is heat treated, a stable enhancement that improves tone and saturation in Montana sapphires, and it has been finished to an excellent polish throughout the pavilion and crown facets, confirming diligent lapidary work and surface integrity.

The trillion cut employed here is a modified triangular brilliant designed to balance scintillation and face up color. The cutter has used a concentrated facet scheme on the crown and pavilion to create a star like light pattern when viewed from the table, and to distribute the intense bluish green color without creating dark corners. The slightly asymmetrical measure of 6.71 by 6.78 mm indicates superior symmetry control for a hand finished trillion, with minimal deviation between opposing girdle points. The chosen depth of 3.70 mm sits in a zone that limits light leakage in the pavilion, while retaining enough crown height to generate lively contrast and pinpoint scintillation across movement. The excellent polish enhances facet junction sharpness, allowing clean optical reflections and maximizing contrast between the highly reflective pavilion facets and the lighter crown facets.

Clarity wise, this sapphire is graded as very slightly included evaluated at eye level, meaning that under standard loupe and unaided viewing conditions the stone presents as clean to the eye with internal features of minimal impact on transparency and light performance. These minor internal features can act as natural light traps that create delicate flashes of internal scintillation without significantly interrupting the overall field of color. The color intensity is rated intense, with a balanced bluish green that demonstrates good saturation for its tone. Montana origin is consistent with this range of hue and saturation, and many Montana pieces display modest pleochroism where the stone shows slightly different color proportions when rotated, a quality that can be used advantageously in setting to display either the bluer or greener side depending on design. The heat treatment applied is conventional for these material types, and it is stable under normal wear conditions, making the color enhancement permanent under standard jewelry care parameters.

From a practical and design perspective, this 1.10 carat trillion sapphire is highly versatile, suitable for both casual daily wear and refined formal settings. Its Mohs hardness near nine and inherent toughness of corundum support secure use in rings, pendants, and earrings, provided the setting design protects the triangular points. Recommended mounting approaches include three prong or bezel settings that reinforce the corners, as well as custom halo designs that can visually increase apparent diameter while protecting edge points. The moderate depth and excellent polish make the stone particularly well suited to solitaire and side stone roles in bespoke engagement pieces, or as a color forward center for modern minimal jewelry. At The Natural Sapphire Company we value provenance and fine cutting craftsmanship, and this Montana trillion sapphire exemplifies the balance of optical performance, durable construction, and natural character that our clients seek. For customers who prioritize technical merit in a stone, this gem offers quantifiable attributes and practical guidance for setting and wear, making it an excellent choice for collectors and designers who appreciate precise cut geometry, consistent polish quality, and a stable heat enhanced color result.