1.72 Ct. Violetish Blue Tanzanite from Tanzania

This transparent 1.72 carat tanzanite, cut to a precise trillion shape, presents dimensions of 7.98 by 8.16 by 4.72 millimeters, and a calculated depth ratio of approximately fifty eight point five percent based on the average face diameter. The body color is a violetish blue with intense color intensity, and the material carries a clarity grade described as very very slightly included, evaluated at eye level, indicating exceptional eye clean appearance with only minute internal characteristics visible under magnification. The stone has been heat treated, a stable and widely accepted enhancement in tanzanite that brings out the rich blue and violet tones for optimal visual appeal, and it is of Tanzanian origin. The polish is excellent, producing mirror like facet surfaces that contribute directly to the gem's ability to return light with minimal surface diffusion, and the overall symmetry is carefully controlled to maintain consistent visual balance across all three wings of the triangle.

The trillion cut is an inherently dynamic shape for tanzanite because it balances broad, near planar facets with a controlled pavilion depth, thereby emphasizing color while preserving lively light performance. In this stone the crown and pavilion angles have been proportioned so that light entering the table is repeatedly refracted between the crown facets and the pavilion planes, producing concentrated color flashes rather than scattered white dispersion. Because tanzanite displays strong pleochroism, showing different hues as the stone is rotated, the triangular layout with its centrally focused table and radial faceting pattern distributes those pleochroic zones evenly, minimizing unwanted windows and dark zones and maximizing even saturation across the face. The trillion configuration also creates a distinctive center star of reflected light when viewed face up, a result of precise facet junctions and a consistent pavilion depth, and that star enhances perceived depth and three dimensionality, drawing the eye into the gem and reinforcing the intense violetish blue character. The cut also encourages crisp scintillation along the edges, where the angular facets catch and release light in a sequence of bright flashes, which contrasts attractively with the broader planes of color visible through the table, giving the stone both lively movement and solid color concentration.

From a practical perspective the dimensions and shape of this tanzanite make it versatile for elegant jewelry applications where a modern triangular silhouette is desired, including solitaire ring settings, three stone designs, or as a striking center for a bespoke pendant. The moderate depth ratio supports secure setting options without sacrificing face up presence, and the excellent polish and facet definition ensure predictable light behavior once placed in metal, with minimal requirement for compensatory mounting techniques. For collectors and designers seeking a gem that presents intense, even color with a crystalline clarity and refined optical performance, this trillion tanzanite exemplifies the technical advantages of an expertly executed cut applied to premium material. The Natural Gemstone Company provides this tanzanite with full disclosure of its treatment and origin, and our quality control emphasizes exacting cutting geometry and finishing to unlock the inherent optical potential of each rough, ensuring the finished gem performs as intended, with balanced light return, saturated color, and enduring visual appeal.