0.91 Ct. Green Sapphire from Madagascar

This specimen is a transparent 0.91 carat oval green sapphire, with finished dimensions of 5.82 by 4.86 by 3.87 mm, presented by The Natural Sapphire Company. The stone exhibits an oval outline with a well proportioned table and a mixed brilliant cut, delivering a strong balance between scintillation and overall brilliance. Color grading indicates a medium light color intensity, and the gem is untreated, with no enhancement recorded. Clarity is reported as very slightly included when evaluated at eye level, and the finish is described as excellent polish. The origin is Madagascar, which is reflected in the green nuances and the natural zoning typical of sapphires from that source. For collectors and designers who prioritize natural material integrity, the combination of transparency, absence of treatment, and origin provenance makes this piece a versatile and secure choice for bespoke work.

From a cutting and proportion perspective, the mixed brilliant faceting strategy applied to this oval optimizes both fire and face up brightness. The length to width ratio of approximately 1.20 produces an elegant oval silhouette that sits well in both solitaire and halo presentations. The depth dimension of 3.87 mm yields a relative depth of approximately 72 percent based on the average of the length and width, a proportion that favors color saturation without significant loss of light return. The mixed brilliant style places precise triangular and kite facets on the crown to promote dispersion, while the pavilion facet scheme is calibrated to return light through the crown with controlled scintillation. The excellent polish ensures minimal surface diffusion of light, allowing facet junctions to remain crisp and contributing to overall optical performance. In practical terms, the cutter has balanced pavilion angles and crown height to maintain face up brightness, while preserving weight for optimal spread.

Clarity and color nuances are integral to how this sapphire will read in a finished jewel. The very slightly included grade at eye level indicates small natural inclusions that do not materially disrupt transparency, and which may actually assist in preventing over transparency that can dilute perceived color. The medium light green shows subtle variation between blue green and yellow green depending on viewing angle, which is consistent with corundum pleochroism. This behavior can be used deliberately during setting to emphasize a preferred hue, by orienting the stone with the pavilion and table to favor the desired color face up. The absence of heat treatment preserves the natural chromophore distribution, which means that the gem will react predictably to metal reflections and surrounding accent stones. Metals with warmer undertones increase perceived warmth and can shift the visual balance toward yellow green, whereas cool white metals tend to emphasize blue green components and perceived saturation.

Customization into finished jewelry benefits from a clear understanding of interaction between setting style and the stone geometry. For ring applications, four prong or six prong prong settings provide maximum light access and will showcase the mixed brilliant faceting and lively scintillation. A low bezel will offer superior protection for daily wear, while slightly diminishing fire due to restricted light entry, making it an ideal choice for active lifestyles. East west mounting can create a contemporary silhouette that accentuates the oval profile, while three stone or cathedral settings use side accents to enhance spread and presence. Halo settings, particularly with near colorless melee diamonds, will increase apparent saturation and perceived size, the contrast encouraging the eye to read the green as more vivid. For pendants and earrings, minimal collet or open basket settings maintain light performance and allow the stone to act as a focal point, while matched pairs are feasible when attention is paid to color zoning and pleochroic orientation to ensure consistency between pieces. Designers should specify seat depth and girdle engagement precisely, to avoid over tightening which can stress the girdle in a deep proportioned oval.

The Natural Sapphire Company offers full bespoke design and setting services to translate the technical attributes of this 0.91 carat oval into a finished jewel that meets both aesthetic and performance goals. We can provide CAD visualizations that demonstrate how different metal choices and setting types will alter perceived hue and brilliance, and we can advise on detailed parameters such as prong thickness, collet wall height, and gallery openness to balance protection with optical access. For clients who value conservation of weight and natural character, we recommend minimal recutting, while full recut services are available for those who prefer alternate proportions. Care recommendations include periodic inspection of prongs or bezel seats, gentle cleaning in warm soapy water, and avoidance of ultrasonic cleaning if the piece has been repaired or set with fragile accents. Our workshop can accommodate requests for complementary accent stones, grading documentation, and secure handling from design through delivery. This Madagascar origin, untreated green sapphire embodies a combination of natural character and cutting precision that adapts well to an array of custom settings, and The Natural Sapphire Company stands ready to realize a tailored piece that highlights the gem technical strengths, while ensuring durability and wearer satisfaction.