1.84 Ct. Greenish Blue Sapphire from Montana

This Montana origin sapphire presents as a transparent, round, mixed brilliant cut gem weighing 1.84 carats, with precise dimensions of 7.10 by 7.11 by 5.13 millimeters. The mixed brilliant cut combines a brilliant facet arrangement on the crown with a faceted pavilion that enhances both scintillation and depth, producing a lively face up appearance. Color is best described as greenish blue with a medium intensity, maintaining a balanced saturation that reads as distinctly cool and slightly teal in natural daylight. Clarity is graded slightly included at eye level, meaning small, characterful inclusions are present but do not dominate the visual presentation, and the excellent polish maximizes surface luster and overall light performance. This sapphire is unenhanced, retaining its natural optical properties and structural characteristics as mined in Montana, and it is presented and documented by The Natural Sapphire Company.

Optically this sapphire demonstrates the robust brilliance typical of corundum, driven by sapphire refractive properties and the precision of the mixed brilliant cut. Compared to lighter pastel blue gems such as aquamarine, which has a lower refractive index and correspondingly softer light return, this Montana sapphire produces stronger flashes of white light and more distinct facet contrast. Against blue spinel, which often offers a similar visual sparkle, sapphire generally exhibits slightly higher refractive dispersion and a firmer, more defined scintillation pattern, making facet junctions read with greater clarity under changing light. When contrasted with blue topaz, which tends to show a more glassy, broad flash due to lower refractive power, this sapphire maintains tighter, more numerous scintillation points and superior contrast between bright and dark facet areas. Within the sapphire category itself, Montana stones are frequently more subtle in saturation than certain Sri Lankan or Kashmir examples, and this results in reflections that favor cool, crystalline flashes rather than the deep, saturated flashes seen in richly colored stones. The mixed brilliant cut of this stone moderates pleochroic effects, allowing the greenish blue to present evenly across viewing angles while still revealing slight color shifts that add depth and interest.

The slightly included clarity and the excellent polish interact to define the practical face up performance of the gem, inclusions being small enough to preserve crisp reflections and maintain a bright table. The measured depth of 5.13 millimeters against a diameter of about 7.10 millimeters yields a depth proportion in the range that encourages strong light return without appearing overly deep in the setting, producing a pleasant presence on the finger as seen in the supplied images. Because the stone is natural and unenhanced, its surface and internal features respond to light in a manner that is true to origin, offering collectors and designers confidence in how the gem will age and perform under normal wear. Durability is inherent to corundum, offering a Mohs hardness of nine that exceeds most alternate blue gemstones and makes this sapphire well suited for everyday jewelry applications where reflective performance and long term stability are priorities.

In summary, this 1.84 carat Montana greenish blue round sapphire offers a refined balance of color, clarity, and cut, presenting lively brilliance and composed scintillation that distinguish it from lower refractive index competitors, while retaining a softer, more natural palette than some intensely saturated sapphire origins. The mixed brilliant cut and excellent polish maximize the gem’s light return, and the untreated nature underscores its natural character. For professional inquiries regarding mounting styles that will best showcase the light performance and color balance of this stone, The Natural Sapphire Company can provide detailed recommendations, provenance information, and fitting options.