0.79 Ct. Yellowish Green Sapphire from Montana

This transparent 0.79 carat round yellowish green sapphire from Montana presents a compact and well balanced profile, with precise dimensions of 5.51 by 5.58 by 3.48 millimeters. The gem exhibits a medium intense color intensity, leaning toward a yellowish green hue that displays subtle variation as the stone is rotated, a characteristic that speaks to the gem s natural pleochroic tendencies. The clarity grade is recorded as very very slightly included, evaluated at eye level, meaning that minute internal features are present but do not interrupt the overall transparency or visual performance when viewed without magnification. This sapphire has been heat treated, a standard enhancement used to stabilize and clarify color, and it benefits from an excellent polish that maximizes surface luster and minimizes light leakage. The Natural Sapphire Company presents this stone as an example of Montana corundum that combines authentic regional character with meticulous lapidary finishing, making it suitable for a range of bespoke settings.

The cutting style is a mixed brilliant, a deliberate combination of a brilliant facet arrangement on the crown with a complementary pavilion geometry designed to enhance both dispersion and color saturation. The table is proportioned to the round outline, and the facet junctions show tight symmetry, which contributes to even light distribution across the face of the gem. The measured depth of 3.48 millimeters against an average diameter of 5.545 millimeters yields a depth ratio of about 62.8 percent, a proportion that supports a strong return of light without creating excessive windowing or a dead center. The pavilion facets are shaped to recycle light into the crown facets, so that the medium intense yellowish green hue remains lively under typical viewing conditions. The excellent polish on both crown and pavilion facets allows for crisp facet reflections and helps reduce surface abrasion, which is particularly important for preserving brilliance in an everyday wearable gem. The mixed brilliant approach here is chosen to balance brilliancy with color retention, a strategy that is especially effective for sapphires with complex yellow green tones.

From a durability and wearability perspective this Montana sapphire benefits from the inherent toughness of corundum, which ranks nine on the Mohs hardness scale, second only to diamond at ten. Compared to quartz which is seven on the Mohs scale, and to many other colored gemstones that range between six and eight, a corundum at nine offers high resistance to scratches and abrasion under normal wear conditions. This level of hardness makes the stone an excellent candidate for rings, pendants, and other pieces that may receive regular contact, while its excellent polish and precise facet junctions further reduce the likelihood of micro abrasion over time. Heat treatment as applied to this sapphire is a stable enhancement when done properly, and it does not materially affect the structural integrity of the corundum, so standard jewelry care practices are appropriate. Avoiding extreme thermal shock and hard impacts will preserve the stone s finish, and routine cleaning with warm soapy water and a soft brush is recommended to maintain optical performance, although professional ultrasonic or steam cleaning should be considered only after consultation, depending on mounting and setting security.

The Natural Sapphire Company stands behind the gemological attributes of this yellowish green Montana sapphire, and we provide detailed specification data to support informed selection and setting decisions. The combination of a well executed mixed brilliant cut, an eye level clarity of very very slightly included, a medium intense yellowish green color, and excellent polish produces a stone that is both technically refined and visually engaging. For clients seeking a durable, everyday wearable sapphire with distinctive regional provenance and optimized cutting geometry, this 0.79 carat round Montana sapphire represents a technically sound and aesthetically versatile choice, ready to be showcased in custom designs that take advantage of its depth ratio, color dynamics, and polished facet precision.