2.50 Ct. Bluish Green Sapphire from Tanzania

As a specialist at The Natural Sapphire Company, I present a single transparent Other certified 2.50 carat oval shape bluish green sapphire, a stone that combines precise gemological attributes with superb lapidary execution, making it an ideal acquisition for a high end gemstone collection. The gem measures 8.70 x 6.68 x 5.11 millimeters, producing a length to width ratio of approximately 1.30, a proportion that retains classic oval elegance while maximizing face up color. The color is described as bluish green with intense color intensity, and the stone is untreated, listed as no enhancement, a factor that greatly increases its desirability and long term value among connoisseurs. Clarity is graded as very very slightly included when evaluated at eye level, which means inclusions are minimal and do not materially interfere with transparency or light return, and the polish is excellent, giving every facet crisp definition and a smooth reflective finish. Origin is Tanzania, a locality that yields sapphires with distinctive color palettes and crystallographic characteristics that appeal to collectors seeking provenance as well as beauty.

The cutting style is a mixed brilliant cut, a deliberate choice by the cutter to balance scintillation and color depth, with a brilliant facet arrangement on the crown to maximize sparkle, and precise step or modified pavilion faceting to concentrate and deepen the bluish green tone. The mixed brilliant approach allows the crown to disperse light and create lively scintillation, while the pavilion geometry directs light back through the table with controlled leakage, enhancing perceived saturation without sacrificing brilliance. The pavilion depth of 5.11 millimeters, when considered against the mean diameter of 7.69 millimeters, yields an overall depth of approximately 66.4 percent, a proportion that favors color concentration and a strong, lively face up appearance. Symmetry has been executed with attention to the oval outline, ensuring even facet alignment and girdle consistency, which in turn supports stable mounting options and predictable optical performance when set. The cutter retained weight intelligently, using gentle facet transitions to preserve carat while optimizing the optical phenomenon of the stone.

From a gemological standpoint the sapphire displays the expected optical behavior of corundum, including strong light return, lively scintillation from the brilliant crown facets, and pleochroism that shows bluish green tones shifting with orientation, a characteristic that enriches visual interest and confirms the natural crystallographic orientation. Corundum hardness of nine on the Mohs scale makes the stone eminently wearable and suitable for frequent wear in high quality jewelry, while a specific gravity near 4.00 and refractive indices in the range typical for sapphire support stable weight to size proportions and strong brilliance. The very very slightly included clarity at eye level indicates that under magnification the stone reveals minimal internal features, yet to the unaided eye the pavilion and crown remain clear and unobstructed, enhancing the purity of the intense color. The excellent polish further ensures that light interacts with the facet planes with minimal scattering, producing crisp contrast and well defined facet reflections, qualities that experienced collectors and lapidaries immediately recognize as markers of fine craftsmanship.

For the advanced collector seeking a high end centerpiece or versatile stone for bespoke jewelry, this 2.50 carat Tanzanian bluish green sapphire embodies a rare convergence of untreated origin, intense natural color, technical cutting excellence, and collector grade clarity. At The Natural Sapphire Company we prioritize both gemological integrity and lapidary artistry, and this sapphire exemplifies that philosophy, offering the sort of aesthetic and scientific credentials that connoisseurs demand. Its dimensions and mixed brilliant faceting make it ideally suited for a variety of settings where the cutter retained weight for hand setting and where the deep but controlled depth will read as a saturated, lively color within the mounting. We can provide detailed imagery, high magnification views, and full certification documentation to facilitate informed acquisition, and we welcome questions regarding mounting recommendations, comparative analysis against similar stones, and condition assessment for investment grade collections. This sapphire is an excellent candidate for collectors who prioritize provenance, craftsmanship, and untreated gem material, and we at The Natural Sapphire Company are pleased to assist with any technical inquiries or purchasing arrangements.