3.39 Ct. Greenish Blue Sapphire from Madagascar

This 3.39 carat transparent oval shape greenish blue sapphire measures 10.12 x 8.09 x 4.98 mm, faceted with a mixed brilliant cut, and presents an intense color intensity with a clarity grade of very slightly included evaluated at eye level. The polish is excellent, and the piece has been heat treated to stabilize and enhance its color, a standard and durable enhancement in high quality sapphires. Origin is Madagascar, a source known for producing sapphires with vivid saturation and attractive secondary tones. As presented by The Natural Sapphire Company, this sapphire offers both aesthetic refinement and technical superiority, combining gemological performance with precision cutting to maximize optical return while preserving natural color saturation.

The mixed brilliant cut used for this oval sapphire pairs a brilliant style crown with a pavilion that includes angular facets to control light return and color. This faceting approach enhances scintillation in the crown while concentrating light in the pavilion to deepen perceived saturation, a desirable outcome for stones with greenish blue hues. Corundum has a refractive index in the range of about 1.762 to 1.770 and a birefringence roughly between 0.008 and 0.010, values that yield crisp facet junctions and defined light contrast when cut and polished to the standards seen here. The combination of excellent polish and carefully executed facet angles produces strong windowing control, balanced extinction, and lively facet to facet flash. Pleochroism inherent to sapphire means the greenish blue body color will shift subtly with orientation, revealing greener and bluer directions, and the mixed brilliant design preserves that directional color play while maintaining uniform face up appearance. Compared to more common gemstones this sapphire stands out in several technical respects. Versus diamond, corundum has lower dispersion, so it does not display the same fire, yet it compensates through intense chroma and directional color shifts which create a depth and richness that diamonds cannot replicate. Versus emerald, which often exhibits heavy inclusions and treatments that reduce transparency, this sapphire offers superior transparency and higher durability at a Mohs hardness of 9, rendering it more suitable for everyday wear. Versus typical blue sapphires, the greenish blue tone provides a rarer hue profile that benefits from the mixed brilliant architecture, producing a lively appearance with nuanced tonal variation rather than a flat single tone.

From a gemological and craftsmanship perspective this stone exemplifies intentional balance between optical performance and natural character. The eye level clarity grading of very slightly included indicates that inclusions are minimal and do not detract from face up brilliance or integrity, while magnification would reveal natural growth features consistent with untreated crystal structure aside from the applied heat treatment. Heat treatment in Madagascar sapphires commonly improves color uniformity and clarity by altering microscopic inclusions and redistributing trace elements, and when performed appropriately the treatment is stable and permanent. The oval silhouette at 10.12 x 8.09 x 4.98 mm is ideal for a variety of settings, allowing for optimally proportioned girdle thickness and pavilion depth, which are key to sustaining intense color while maximizing light return. For connoisseurs seeking a sapphire with measurable optical qualities, this stone offers a well executed mixed brilliant faceting scheme, exacting polish, and a compelling color profile that differentiates it from more ubiquitous blue sapphires and from colorless stones. The provenance of Madagascar adds collectible appeal, as recent years have seen mines there produce specimens of exceptional tone and saturation, and The Natural Sapphire Company stands behind both the origin and the integrity of the enhancement disclosure.

When considering this sapphire for a commission, clients often appreciate technical details such as exact dimensions, pavilion depth ratio relative to table size, and specific facet relationships to predict behavior in their chosen mounting. This 3.39 carat oval performs predictably in both solitaire and halo designs, where the mixed brilliant cut will read as lively and dimensional under varied lighting conditions. Its hardness and polish quality support regular wear as an engagement center stone, while the intense greenish blue color offers a distinctive alternative to common blue sapphires and to colorless stones. For buyers who value precise cutting, traceable origin, and thorough enhancement disclosure, The Natural Sapphire Company provides full documentation and service recommendations, including recommended protective settings and routine care. If you would like detailed facet maps, viewing videos, or a consultation on settings that will best showcase the combination of brilliance and color depth in this stone, we are available to assist with technical guidance and custom design options.