9.72 Ct. Green Sapphire from Tanzania

This transparent 9.72 carat radiant shape green sapphire measures 13.23 by 10.18 by 7.13 millimeters, yielding a depth of approximately 60.9 percent, and presents a faceted radiant cut with precisely trimmed corners. The cutting style combines a brilliant facet arrangement on the crown with controlled step facets on the pavilion, optimized to balance scintillation with color distribution, and the excellent polish enhances table brilliance and facet contrast. Clarity is graded very slightly included at eye level, with inclusions positioned and minimized through the cutter’s orientation to preserve visual performance and weight retention. Color shows a medium intensity green, consistent and evenly distributed across the pavilion and crown, with no evidence of enhancement, and the origin is Tanzania, a source known for producing well crystallized sapphire rough. The gem’s proportions, symmetry, and facet junction quality indicate deliberate craftsmanship focused on maximizing light return and hue saturation, making the stone suitable for a high end centre gem setting where its radiant geometry will accentuate both sparkle and color presence.

From an investment perspective this 9.72 carat untreated green sapphire represents a compelling proposition for collectors and investors seeking exposure to colored gemstones, because untreated stones of near 10 carats are statistically rarer and command a premium relative to smaller or treated material. The combination of size, natural coloration, very slightly included clarity, and excellent polish contributes to both immediate desirability and longer term scarcity value, and provenance from Tanzania with full disclosure further supports market confidence. While past performance is not a guarantee of future returns, well documented untreated sapphires of notable size and appealing color have demonstrated price resilience and steady appreciation in the primary and secondary markets, driven by constrained supply and increasing collector interest in distinctive hues. The Natural Sapphire Company provides detailed documentation and expert assessment to assist in resale and valuation, and investors are advised to obtain independent certification and to consider professional setting and insurance to protect and potentially enhance the stone’s long term value. For buyers focused on technical quality and future appreciation, this piece offers a rare synthesis of natural origin, impeccable cutting technique, and investment oriented attributes.