1.13 Ct. Bi Color Sapphire from Montana

This transparent bi color sapphire weighs 1.13 carat and is presented in a classic oval shape, with exact dimensions of 5.91 by 5.16 by 4.17 mm. The gem is fashioned with a mixed brilliant cut, a choice that balances scintillation from the crown with depth and color display from the pavilion. Clarity has been evaluated at eye level as very very slightly included, a grade that indicates minimal internal features that do not detract from overall transparency or light performance. Surface finish is excellent, with a polish that enhances both brilliance and the subtle interactions of the two dominant hues. The stone has been heat treated, a common and stable enhancement to optimize color and clarity, and its documented origin is Montana, a source known for producing characterful and distinct sapphires.

Color presents as a true bi color phenomenon, with complementary tones that shift with viewing angle and light source, and the overall intensity is classified as medium intense. This combination of two recognizable hues in a single transparent sapphire of this size is uncommon when compared to the more frequently encountered single color sapphires in the same weight class. Many bi color examples are found either at smaller sizes where zoning reads more as patchy color, or at larger sizes where crystal growth conditions allow more extensive color separation. A 1.13 carat bi color sapphire with medium intense saturation therefore occupies a narrow segment of the market, offering both wearable dimensions and an intriguing color display that is both evident and well balanced. The mixed brilliant cut has been selected to maximize the depth and movement of each hue, so that the bi color effect is visible without sacrificing light return or overall face up appearance.

From a practical and design perspective this sapphire is versatile and resilient, with the hardness and durability expected of corundum, making it suitable for daily wear in rings, pendants, or earrings when set with appropriate protection in the setting design. Its modest size allows for elegant center stone applications where the bi color nature can be oriented to show the preferred hue interplay, or it can be paired with complementary accent stones to emphasize one color or the other. The provenance from Montana contributes additional interest, as material from this region often displays unique color characteristics and crystal habits not commonly seen in other classic producing areas. The Natural Sapphire Company documents the treatment and grading observations for transparency and provenance, and this example illustrates the company commitment to clear communication about enhancement, clarity at eye level, and measurable dimensions. For collectors and designers seeking a genuinely uncommon bi color transparent sapphire in an accessible carat weight, this stone represents a rare and well specified option.