1.70 Ct. Bi Color Sapphire from Madagascar

This transparent 1.70 carat radiant shape bi color sapphire, offered by The Natural Sapphire Company, presents a precise balance of size, color and clarity, with dimensions of 7.22 x 5.24 x 4.34 mm. The gem displays a medium intense color intensity that shifts across the pavilion and crown, producing a pleasing duality of tones that is the hallmark of a bi color stone. Clarity is graded as very very slightly included, evaluated at eye level, which means that at normal viewing distances the stone is visually clean and free from features that distract from its overall brilliance. The cut is a true radiant cut, and the polish is excellent, allowing for crisp facet junctions and a clean surface that maximizes light transmission. The stone has been heat treated, a standard and stable enhancement for sapphires that improves color uniformity and clarity without compromising structural integrity. Origin is Madagascar, a source known for producing sapphires with attractive color ranges and fine crystallographic properties, and this provenance contributes positively to the gem's market desirability and geological story.

The radiant cut has been executed to take full advantage of sapphire optics, with a facet pattern that promotes controlled light reflection and lively scintillation. Radiant cuts combine trimmed corners with a brilliant facet arrangement on both the crown and pavilion, producing a complex interplay between large flashes of white light and smaller, colorful scintles. For this bi color sapphire, the facet geometry enhances the transition between its two color zones by refracting and reflecting light in a manner that emphasizes contrast while preserving overall harmony. The crown facets act as windows to draw light into the pavilion, where strategically angled pavilion facets return that light as both brilliance and dispersion. The result is a dynamic visual effect, where color appears to shift and intensify as the gem and the observer move, and where the medium intense color is never lost beneath excessive darkness or washed out by an overly shallow cut. Excellent polish ensures that the surface does not scatter light unnecessarily, so that the gem’s inherent refractive index and strong pleochroic tendencies are presented with clarity and sparkle, and so that inclusions graded as very very slightly included remain unobtrusive in normal wear.

To an educated buyer this sapphire represents a compelling synthesis of gemological quality, aesthetic complexity and practical resilience. Madagascar as an origin offers a recognized and attractive source, with material that often displays interesting color varieties and strong crystallographic stability. The heat treatment indicated is a common, industry accepted practice that enhances appearance in a way that is permanent under normal wear conditions, and the clarity grade evaluated at eye level confirms that the stone will perform visually in finished jewelry without the need for magnification to appreciate its beauty. The radiant shape at 1.70 carats sits in a weight class that is versatile for many design intentions, from a refined solitary ring to an elegant pendant or as the centerpiece in a bespoke setting, and the measured dimensions lend themselves to practical design proportioning. For collectors and designers who value optical performance, the cut, polish and bi color nature combine to produce a stone that rewards close study, offering depth, movement and a nuanced color story. The Natural Sapphire Company stands behind the gemological description and is available to provide further details on facet proportions, certified reports, and design recommendations to ensure that this radiant bi color sapphire is set and presented in a way that emphasizes its best optical and physical qualities.