1.50 Ct. Bi Color Sapphire from Montana

This one point fifty carat oval bi color sapphire from Montana presents as a transparent, finely fashioned gem intended to function as the focal point in a high end collection or bespoke commission. The stone measures seven point zero five by five point seven four by four point five seven millimeters, reflecting a compact yet authoritative face up area for its weight. Cut as a mixed brilliant, the cutting approach marries a brilliant facet pattern on the crown with a modified facet scheme on the pavilion, a combination chosen to maximize both scintillation and color interplay. The gem is graded slightly included at eye level, with inclusions that are present but do not dominate the visual field when mounted, and it carries a medium intense color intensity that reads as warm champagne to soft golden through a range of viewing angles. Heat treatment has been applied in a controlled manner to stabilize tone and clarify hue, and the finish is described as excellent polish, resulting in crisp facet junctions and lively light return. The Natural Sapphire Company presents this sapphire as a workmanlike example of classical cutting married to natural character.

From a faceting perspective the mixed brilliant layout used for this oval is calibrated to the stone geometry, with a length to width ratio of approximately one point two two eight, a proportion that preserves the traditional oval silhouette without elongating the appearance excessively. The measured overall depth of four point five seven millimeters, when compared to the average of the length and width, yields a depth of roughly seventy one point five percent, a deeper pavilion than many commercial cuts but one that contributes to concentrated light scattering and saturated flashes when the stone is viewed face up. The crown is faceted in a multi tiered brilliant arrangement, with smaller crown facets that enhance scintillation and create numerous small flashes, while the pavilion employs elongated modified facets that redirect light back through the crown, reinforcing color zones and creating a balanced mix of white brilliance and colored flash. The result is a gem with notable bite when tilted under direct lighting, a dynamic appearance that rewards movement and results in a strong presence as a centerpiece.

Color behavior is central to the appeal of this bi color sapphire, and the medium intense grade indicates a rich, yet not overpowering saturation. The stone displays two related color zones that shift subtly with orientation, a phenomenon consistent with pleochroic response in corundum. Face up the dominant impression is a warm golden champagne, while table down or when viewed in profile cooler, near neutral areas can be observed. The mixed brilliant cut accentuates this bi color character, because the interplay between shallow crown facets and deeper pavilion facets allows different light paths to emphasize separate color zones. Heat treatment has been applied to stabilize and even out distribution, reducing the appearance of any overly dark patches while preserving the underlying bi color personality. For a collector who prizes color complexity, this Montana specimen offers a nuanced spectrum, with tonal depth in certain facets and delicate transparency in others, making it particularly well suited to designs that allow movement and reorientation.

Clarity for this gem is cataloged as slightly included evaluated at eye level, and the internal features are consistent with natural Montana material. Inclusions are primarily small pinpoint crystals and fine internal growth features that can serve as identifying characteristics rather than detriments to performance. Under loupe and in hand the inclusions provide a sense of origin and natural formation, while the overall transparency remains high enough that light transmission and return are excellent. The excellent polish contributes significantly to perceived clarity, because well executed facet planes minimize diffusion and enhance surface reflection, ensuring that the stone reads clean in most settings. From a durability standpoint the inclusions do not present any inherent weakness, and the stone has undergone routine heat enhancement that is industry standard to optimize both stability and visual appeal. For connoisseurs the slight internal markers can be an asset, reinforcing the natural provenance and making each viewing unique.

For practical mounting and design the stone functions exceptionally as a central element, whether set in a three or four prong head that allows ample light penetration, or secured in a low bezel that emphasizes shape while protecting the girdle and pavilion. Given the warm, medium intense color palette the sapphire pairs particularly well with eighteen karat yellow gold or warm rose gold to enhance the golden notes, while a platinum or white gold surround will modernize the presentation and emphasize brilliance and contrast. Because the cut exhibits a deeper pavilion, consideration should be given to the setting depth to avoid visual narrowing in heavy bezel designs, and to allow the pavilion to contribute fully to the light return. The Natural Sapphire Company offers this Montana bi color oval as a singular candidate for a signature ring, pendant, or small scale brooch, a gem whose mixed brilliant faceting and excellent polish produce an arresting blend of scintillation and color motion, a true centerpiece for collectors and bespoke clients who appreciate technical excellence and natural character.