10.20 Ct. Tanzanite from Tanzania

This transparent 10.20 carat heart shape blue tanzanite measures 13.17 x 13.76 x 8.27 mm, presenting a substantial and well balanced profile for a heart motif, combined with a mixed brilliant cut that optimizes both table brilliance and pavilion scintillation, clarity graded as eye clean at typical viewing distance, vivid color intensity, and an excellent polish, enhancement, heat treated, and origin, Tanzania, recorded for provenance. The stone displays a pure, saturated blue violet that is the signature of fine tanzanite, its transparency and eye clean clarity allowing light to travel through the mixed brilliant facets and produce lively fire and a deep, consistent hue from crown to pavilion. The heart shape is executed with symmetry and proportional depth, so that the pavilion depth of 8.27 mm supports both stability in a mounting and the visual impact expected of an above ten carat gem. The treatment note is stated up front, heat treated, acknowledging the standard practice used to remove brownish tones and reveal the vivid blue violet seen here, and The Natural Gemstone Company documents this information for clarity and responsible presentation.

When placed in the context of historically famous gemstones, this tanzanite shares certain virtues while retaining a distinct identity. Like the Hope Diamond, it attracts focus principally through its color, but where the Hope is famed for an intense deep blue in diamond, this tanzanite offers a velvety blue violet that shifts with viewing angle due to strong pleochroic character typical of tanzanite, a dynamic not present in single tone diamonds. In terms of scale and clarity, its 10.20 carat weight and eye clean clarity recall aspects of the Cullinan stones, where size partners with exceptional clarity to elevate desirability, yet the emotional resonance of the heart shape aligns more with historically notable jewels that convey symbolism, rather than mere mass. Unlike the Kohinoor and other historic diamonds that derive primary value from weight and historical provenance, this specimen derives unique value from the convergence of rare large size for tanzanite, vivid saturated color, exceptional polish, and transparent clarity, all sourced from Tanzania, the exclusive origin for gem quality tanzanite. The Natural Gemstone Company provides full documentation and measured specifications, so the gem can be appreciated both as a collector grade specimen and as an enduring center stone for refined jewelry.