4.00 Ct. Bi Color (Peacock) Tanzanite from Tanzania

This transparent 4.00 carat asscher octagon shape bi color peacock tanzanite measures 8.55 x 8.46 x 6.52 mm, and it is a study in precise cutting and natural complexity, offered by The Natural Gemstone Company. The stone is faceted in the classic asscher step pattern, with a broad square table, concentric square step facets on the crown and pavilion, and a balanced girdle that preserves the octagonal outline. The asscher faceting emphasizes parallel light return, producing crisp flashes of intense color, and the excellent polish elevates facet junction clarity to a very high standard. Clarity grade very very slightly included evaluated at eye level confirms that the stone is effectively clean to immediate inspection, yet it retains internal characteristics that distinguish it as a natural specimen from Tanzania, and there is no enhancement. The intense color intensity ranges across peacock tones, with cool blue violet dominant in the face up view and greenish blue zoning visible at certain pavilion angles, a duality that the asscher geometry renders as vivid color windows and stepped color bands.

The inclusions in this specimen create an unmistakable signature, and their interaction with the step faceting is the gems defining trait. Fine oriented platelet lamellae lie parallel to certain growth planes, producing narrow iridescent reflections when light meets the pavilion steps, and these platelets act like internal mirrors that separate the bi color zoning into discrete bands. Scattered tiny negative crystals and pinpoints occur near the lower halves of the pavilion, they are minute enough to preserve eye clean appearance while contributing to scintillation under movement, and a handful of very fine needle like growth tubes align with crystallographic directions, reinforcing the peacock flash when viewed off axis. The cutter intentionally retained and positioned these features, using facet proportions and crown height to create internal light pathways that highlight the natural inclusions rather than conceal them. The result is a technically refined asscher tanzanite that offers collectors and discerning designers a gem with both exceptional optical performance and an individual inclusion fingerprint, a type of specimen that The Natural Gemstone Company presents for bespoke settings and high end collections.