5.70 Ct. Violetish Blue Tanzanite from Tanzania

Presented by The Natural Gemstone Company, this transparent 5.70 carat oval tanzanite measures 11.76 x 9.88 x 6.99 mm, and exhibits a vivid violetish blue hue originating from Tanzania. The gem has been heat treated to stabilize and enhance color, and it carries a clarity grade described as very very slightly included at eye level, indicating only minimal natural features that remain unobtrusive to the unaided eye. Cut as an oval with a mixed brilliant faceting scheme, the stone combines a traditional brilliant crown with a carefully proportioned pavilion, and its polish is evaluated as excellent, ensuring clean facet junctions and reflective surfaces.

The geometric faceting of this mixed brilliant cut is engineered for maximum light play, with a calculated arrangement of crown and pavilion facets that capture incident light and return it as measured brilliance, vivid flashes, and lively scintillation. Crown facets disperse light across the surface while the pavilion geometry directs light back through the table, producing an interplay of deep violet and blue tones that shift with viewing angle and lighting conditions. Precision facet symmetry and facet proportions minimize windowing and dark zones, preserving color saturation and enhancing perceived depth, and the generous table and well balanced pavilion depths create a strong face up presence for its 5.70 carat weight. The combination of vivid color intensity and excellent polish results in crisp facet reflection and a highly dynamic appearance under both natural and artificial lighting.

This tanzanite is suitable as a centerpiece for refined jewelry designs where unobstructed light access will maximize optical performance. Open prong or low profile settings will allow the faceting architecture to perform optimally, while secure mounting will protect the stone without compromising light return. Documentation regarding heat treatment and Tanzanian origin is available upon request, and The Natural Gemstone Company provides condition assessment details to support appraisal and design decisions. This specimen presents a balanced synthesis of weight, color, clarity, and expertly executed faceting, delivering both technical quality and an engaging visual character.