6.70 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This fine example from The Natural Sapphire Company is a transparent 6.70 carat oval blue sapphire, presented in a classic oval silhouette with dimensions 12.57 x 9.37 x 6.76 mm. Origin confirmed as Ceylon Sri Lanka, the stone exhibits a medium intense blue color intensity that reads as rich and bold in the face up view, and that projects a clear sense of personal power and distinction when set as the focal element of high end jewelry. The medium intense grade indicates a balanced combination of hue and saturation, resulting in a strong, vivid blue that maintains excellent light return without becoming opaque or overly dark. Enhancement by controlled heat treatment has been applied, a standard and stable method for improving blue hue saturation and reducing the appearance of microscopic inclusions, without compromising long term stability or optical performance.

The cutting and proportions of this sapphire are central to its visual impact, and the mixed brilliant cut has been executed to optimize both color and scintillation. The mixed brilliant design combines a brilliant facet pattern on the crown with a modified pavilion that includes controlled step facets, a configuration that concentrates color centrally while creating dynamic flashes of white brilliance across the crown. The stone presents a length to width ratio of approximately 1.34 to 1, a proportion that favors a balanced oval appearance ideal for both solitaire and multi stone settings. Depth measures 6.76 mm, which corresponds to approximately 53.8 percent of the length, and approximately 61.6 percent of the average of length and width, proportions that indicate a thoughtful trade off between table size and pavilion volume, maximizing face up spread while preserving internal light return. The excellent polish amplifies the mixed brilliant architecture, producing crisp facet junctions and minimal surface disturbance so that the table and crown facets offer clean windows into the sapphire rather than diffuse reflections.

Clarity is graded as very slightly included, evaluated at eye level, which for practical wear means the stone is visually transparent and free of distracting inclusions to the naked eye. Under loupe or microscope the clarity characteristics are consistent with natural Ceylon material, typically including fine silk or pinpoint crystals that contribute to the stone character and that can enhance overall color saturation by light scattering. The presence of these minor internal features is a hallmark of natural origin, and when combined with meticulous cutting, they impart depth and complexity to the blue. Craftsmanship details are evident in the precision of facet alignment, the symmetry of the oval outline, and the clean girdle execution, all of which ensure predictable light behavior when the gem is mounted. For setting recommendations, the proportions and weight distribution make this sapphire particularly well suited to a classic east west or north south solitaire, a halo design where the medium intense color will read boldly against white metal, or a three stone composition where the mixed brilliant cut will complement brilliant cut side diamonds without competing for scintillation. This sapphire offers collectors and bespoke clients an opportunity to acquire a piece that combines the geological pedigree of Ceylon material, the stability and enhancement benefits of skilled heat treatment, and the considered optical engineering of a mixed brilliant cut, culminating in a gem that communicates personal power and distinction through its rich, bold color and refined technical execution.