0.91 Ct. Greenish Blue Sapphire from Montana

This exquisite transparent 0.91 carat oval greenish blue sapphire measures 6.12 by 4.86 by 3.85 millimeters, and is presented in a well proportioned mixed brilliant cut that maximizes scintillation and light return. Graded as very very slightly included when evaluated at eye level, this sapphire is effectively eye clean to most observers, with only minute inclusions that do not distract from its overall transparency or brilliance. The color intensity is described as intense, and the polish has been evaluated as excellent, producing crisp facet junctions and lively brilliance from face up and in profile. Origin confirmed as Montana, and heat treatment applied to enhance color and clarity, this stone reflects the quality standards that collectors and connoisseurs expect from The Natural Sapphire Company.

The greenish blue hue of this Montana sapphire is what sets it apart, offering a coastal teal character that sits between classic blue and verdant green, with a slightly cool undertone that reads as sophisticated and unusual in the market. Compared to Kashmir sapphires, which are famed for their cornflower blue hues with a velvety, almost silk like saturation and a medium deep tone, this Montana stone shows a more green influenced palette and a crisper, more transparent face up appearance. Against Sri Lankan Ceylon sapphires, which typically display brighter, silvery blues with lighter tones and lively brilliancy, the Montana example carries deeper green facets and a more complex secondary tone that gives the gem a sense of depth and movement. Compared to Australian blue sapphires, which often trend toward a dense inky blue green with heavier tones, this Montana gem remains lighter and clearer, offering more sparkle and a fresher, more daylight friendly hue.

From a gemological and investment perspective the mixed brilliant cut on an oval outline provides superior optical performance for a greenish blue sapphire of this size, balancing table size with pavilion depth to deliver excellent brilliance and dispersion. The proportions at 6.12 by 4.86 by 3.85 millimeters and the overall weight of 0.91 carats indicate a well cut stone that sits attractively in many modern engagement or fashion settings, without the bulkiness of larger stones while retaining eye catching presence. Very very slightly included at eye level means only fine pinpoints or wisps are present, which in combination with the intense color intensity increases desirability, because it is rare to find such a vivid Montana hue paired with high transparency. Heat treatment is the industry standard enhancement for sapphires, and when disclosed as it is here, it is considered stable and fully acceptable to connoisseurs, particularly when the natural origin is documented, as it is for this Montana stone.

For an educated buyer assessing value and uniqueness, Montana sapphires occupy a distinct niche in the global market, prized for their greenish blue and teal varieties that differ from the deep royal blues of Burma, the cornflower velvets of Kashmir, and the vivid silvery blues of Sri Lanka. Where Burmese sapphires can present a concentrated royal blue with a heavier tone and where Kashmir pieces often have that famed velvety diffusion, this Montana sapphire presents clarity and a lively reflectivity that reads as more contemporary and versatile in jewelry design. The Natural Sapphire Company stands behind the origin, cut precision, and grading provided, and we are happy to offer further laboratory reports or magnified images upon request, because transparency and provenance matter to collectors. Proper care includes routine cleaning with warm soapy water and a soft brush, avoiding rapid temperature changes and harsh chemicals, and periodic professional inspections when set, ensuring this greenish blue Montana sapphire continues to deliver its distinctive hue and exceptional brilliance for generations.