5.08 Ct. Ametrine from Ceylon (Sri Lanka)

This listing presents a single transparent cushion shape bi color ametrine weighing 5.08 carats, a specimen that combines notable size with refined cutting and provenance. The gem measures 10.27 x 10.09 x 8.52 mm and is fashioned in a mixed brilliant cut that balances faceted brilliance with a pleasing outline. The clarity grade is very slightly included evaluated at eye level, the color intensity is medium, and the polish has been assessed as excellent. The stone has undergone controlled heat treatment to enhance its stability and color distribution. Origin is Ceylon Sri Lanka, and the piece is offered with the provenance and quality standards of The Natural Gemstone Company.

The reported weight of 5.08 carats is central to this ametrine s character and to its market position. Ametrine of this size is uncommon, because the crystal conditions that produce the natural zoning between amethyst and citrine are spatially limited, and larger clean sections of such material are rarer in the rough. Weight correlates directly with rarity in facetable colored gems, and each additional carat typically increases desirability more than linearly because larger gems are less frequently available on the market. In practical terms the 5.08 carat weight yields a visible presence when set, offering a scale and proportion that smaller ametrines cannot match, and enabling design possibilities that require a substantial table, deeper pavilion, or more elaborate mounting.

Beyond rarity, the weight affects the gem s optical performance and perceived value in several measurable ways. The dimensions of 10.27 x 10.09 x 8.52 mm give the cutter ample material to produce balanced facets that maximize return of light and emphasize the bi color zoning. In a gem of this mass the mixed brilliant cut is able to create strong scintillation and a lively crossover between purple and golden tones without sacrificing face up coverage. The medium color intensity benefits from the volume of material because sufficient depth allows color saturation without appearing overly dark or muddy. The very slightly included clarity at eye level indicates that the inclusion profile does not materially detract from transparency or brilliance, and the excellent polish ensures clean facet junctions that allow the gem to present at its full optical potential.

From a valuation and setting perspective the 5.08 carat weight invites both collector and design interest. Larger ametrines command premium pricing in comparison to smaller pieces of similar color and clarity because they satisfy both rarity and utility criteria. For a jeweler or private collector the weight enables center stone applications in rings, pendants, and bespoke pieces that require a commanding focal point. The Ceylon Sri Lanka origin adds a layer of provenance that is relevant to connoisseurs who track locality characteristics, and the documented heat treatment is a standard enhancement that stabilizes color while remaining consistent with accepted trade practices. The Natural Gemstone Company presents this ametrine as a candidate for custom design or as a collectible specimen, with a clear emphasis on its size driven rarity, its balanced cutting and polish, and its overall suitability for pieces where weight and presence are decisive attributes.