0.51 Ct. Bluish Green Sapphire from Montana

This listing describes a single transparent 0.51 carat radiant shape bluish green sapphire, presented by The Natural Sapphire Company. The weight of 0.51 carat denotes a gem that combines tactile presence with refined wearability, and it is an important indicator of the stone material and cut efficiency. The sapphire measures 5.11 by 3.90 by 3.10 millimeters, dimensions that reflect a well proportioned pavilion and crown for this size class. The radiant shape provides a compact footprint with ample visual surface area, which enhances perceived size relative to weight, and the balanced proportions allow for even light distribution across the table. This gem presents as transparent, enabling internal features to be observed and evaluated, and the reported characteristics emphasize quality attributes that are relevant to both gemological assessment and practical jewelry design.

The cut and finish of this sapphire are intentional and precise, the stone exhibits a radiant cut known for its mixed step and brilliant facets, and the facet arrangement contributes to scintillation and a lively internal reflection pattern. The polish is graded excellent, which indicates smooth facet planes and crisp facet junctions, contributing to optimal light performance and refined appearance. Clarity is graded slightly included at eye level, a grade that denotes the presence of minor natural inclusions which do not significantly detract from overall transparency or brilliance when viewed without magnification. The color is described as bluish green with medium intensity, a spectrum that conveys subtlety and complexity, and the medium color intensity yields a shade that reads consistently under typical daylight with pleasing saturation. Enhancement is limited to heat treatment, an established and stable process that enhances color uniformity and tone, and the origin is Montana, a provenance that is recognized for producing sapphires with distinctive, often cool toned color profiles.

The reported weight of 0.51 carat is central to the evaluation of premium quality for this sapphire, because carat weight interacts with cut proportions and color to determine both aesthetic impact and market value. At this weight, the stone offers a balance between visual presence and versatility for a wide range of settings, including delicate solitaires and bespoke three stone arrangements. The compact dimensions of 5.11 by 3.90 by 3.10 millimeters paired with the radiant shape allow a jeweler to maximize face up area while retaining strong pavilion depth for controlled light return. When assessing premium quality, the combination of precise cutting, excellent polish, and an even medium color intensity is especially significant, because these factors amplify the stone weight in perceived value. Slightly included clarity at eye level is consistent with natural origin, and for many collectors and designers it affirms authenticity and character without substantially reducing visual appeal.

This sapphire is presented with the professional standards of The Natural Sapphire Company, and it is suitable for customers seeking a natural, heat treated Montana sapphire with a refined balance of weight, color, and finish. The 0.51 carat weight positions the stone as a premium component for focused design work, and the radiant cut with excellent polish supports settings that emphasize brilliance and modern geometry. The medium intensity bluish green color and transparent body allow the gem to perform well in both white metal and warm metal mountings, and the natural inclusions intrinsic to the slightly included clarity grade provide internal features that authenticate natural formation. In summary, this 0.51 carat radiant shape Montana sapphire combines measured dimensions, meticulous cutting, and stable heat enhancement to represent a premium quality natural sapphire offering, available through The Natural Sapphire Company.