0.91 Ct. Green Sapphire from Montana

This 0.91 carat transparent green sapphire measures 5.69 x 5.99 x 3.73 mm, it presents a precise trillion shape cut that balances a bold triangular silhouette with refined optical performance. The trillion cut here follows a triangular brilliant philosophy, with a well proportioned crown and pavilion structure that directs light through a dense network of smaller star and kite facets, producing consistent scintillation across the table and along the three radiating lobes. The cutter has maintained symmetry across all three sides, preserving equal angles and facet junctions, which minimizes light leakage at the corners and enhances face up evenness. The color registers as an intense green, with tone and saturation that remain stable across viewing angles, and the surface finish is an excellent polish, providing crisp facet junctions and a high degree of reflectivity. Enhancement by heat treatment has been applied to optimize the inherent color and clarity characteristics, and the stone is documented as originating from Montana, a locality known for distinctive, often subtly complex green to teal sapphire material.

Clarity is graded as very slightly included, evaluated at eye level, and the inclusion profile is consistent with a gem that has been selectively oriented and cut to conceal and diffuse minor internal features. Under loupe and unaided observation the placements of rutile or small crystal inclusions do not interrupt the primary light paths, which allows for strong internal reflection and an open, transparent appearance. The cutter utilized strategic facet placement to mask linear inclusions and to exploit the refractive indices of corundum, aligning pavilion facets to promote constructive internal reflections and to enhance perceived depth. From a lapidary perspective the relationship between table size and pavilion depth has been calibrated to this specific weight and dimension range, ensuring that the 3.73 mm depth supports adequate crown height for brilliance without sacrificing face up size. The excellent polish further reduces surface scattering, so light returns as defined flashes of white and colored light rather than diffuse haze, an important technical distinction for serious collectors and set designers.

Owning this Montana green sapphire from The Natural Sapphire Company represents an investment in both aesthetic value and refined craftsmanship. Montana sapphires occupy a particular niche within the market due to their geological provenance and the character of their colors, and a precisely cut 0.91 carat trillion that combines intense color, high transparency, and superior polish is a collectible configuration for connoisseurs who value technical excellence. The heat treatment applied is a stable and well understood enhancement used to bring the best optical properties forward from the rough, and the resulting piece benefits from corundum hardness and wearability that make it suitable for daily jewelry applications. From an artisan perspective the stone exemplifies disciplined lapidary decision making, where orientation of the rough, choice of a triangular brilliant faceting scheme, and meticulous polishing converge to produce a gem that reads as both luminous and structurally optimized. For buyers who prioritize measurable attributes such as facet execution, symmetry, clarity grading, and documented origin, this gemstone is an enduring expression of beauty and workmanship, and a considered acquisition for any serious collection or bespoke setting.