7.24 Ct. Ametrine from Ceylon (Sri Lanka)

This 7.24 carat bi color ametrine presents a study in controlled faceting and material response, offered by The Natural Gemstone Company. The stone measures 17.44 by 8.79 by 5.22 millimeters, dimensions that are ideally suited to an elongated emerald cut. The emerald cut is executed with parallel step facets on both the crown and pavilion, creating broad planes that emphasize the zonal color separation rather than dispersive sparkle. For a bi color material such as ametrine, that approach is deliberate, because step facets preserve and reveal the linear transition between yellow and violet, and because the long table reduces visual noise allowing the observer to evaluate the color interface and saturation with clarity. The cutting orientation was chosen to follow the natural growth zoning of the crystal, so that the color boundary is presented with crispness across the length of the stone, and the facet junctions have been placed to minimize windowing and to maximize perceived depth and color contrast.

Material quality is a key determinant of both aesthetic appeal and long term value, and this piece scores highly on technical metrics. Clarity is graded eye clean at typical viewing distance, indicating that there are no inclusions that interfere with unaided visual inspection. For step cut designs, high clarity is essential because inclusions would otherwise be more apparent across the broad facet faces, and eye clean material allows the color transition to remain the primary visual feature. The color intensity is described as medium intense, which in practice means the yellow and violet components are well saturated without reaching overpowering or dark tones, a balance that preserves pleochroic characteristics and ensures good light transmission. The gem has received a professional polish grading of excellent, so facet junctions are sharp and facet planes are smooth, producing crisp reflections and allowing the interplay of color to be read accurately by the eye.

This ametrine has undergone heat treatment, an enhancement that is common and widely accepted within trade practice when it is used to stabilize or improve color distribution. Heat treatment in quartz is applied with careful thermal profiling to optimize the valence state of iron within growth zones, reducing undesirable brownish or smoky tints and enhancing the distinct yellow and violet tones that define ametrine. Because treatment alters the crystal chemistry in controlled ways, documentation and transparency are important. The Natural Gemstone Company provides full disclosure of this enhancement, and our gemological team can supply treatment notes and handling recommendations. Treated stones, when properly disclosed and professionally executed, offer excellent value because they combine aesthetic improvement with stability, and this specimen retains natural zoning lines that echo its formation history while showing the enhanced color separation that treatment can achieve.

Provenance is often an overlooked factor in valuation, and the origin of this ametrine from Ceylon Sri Lanka is significant for several reasons that resonate with informed buyers. Sri Lanka has a long established gem cutting and trading infrastructure, with experienced lapidaries who understand how to orient and cut zoned materials to maximize both color and yield. A Sri Lankan origin also implies access to rigorous trade routes and long standing practices for origin verification, which can be of particular importance to collectors seeking documented supply chains. While Bolivia remains the historical primary source of ametrine, a piece that can be traced to Ceylon gains added market interest because it represents a less common geographic association for the material, and because Sri Lankan provenance often carries an implicit premium due to craftsmanship reputation and established export controls. For the technically minded buyer, the combination of island provenance, traceable handling, and specialist cutting enhances both collectability and commercial resilience.

From a design and setting perspective this rectangular emerald cut is exceptionally adaptable, and the technical attributes make it suitable for precision jewelry work. The rectangular outline and measured depth profile permit secure bezel or prong settings that protect the corners while showing the full lengthwise color gradient, and the balanced crown angle and pavilion step layout were selected to minimize light leakage given the medium intense color, thereby maintaining brightness when mounted. At 7.24 carats the stone has a presence that reads as substantial in both rings and pendants, and because the clarity is eye clean and the polish is excellent, it will take a high degree of magnification without compromising face up appearance. For buyers who require documentation, The Natural Gemstone Company provides condition reports that include measurements, carat weight, clarity observations, color notes, and enhancement disclosure, allowing jewelers and collectors to make informed decisions based on precise technical data.