6.65 Ct. Bi Color Ametrine from Brazil

This specimen is a transparent, faceted bi color ametrine weighing 6.65 carats, presented in a classic emerald cut. The gem measures 12.93 x 9.62 x 7.38 mm, and it exhibits medium color intensity that transitions cleanly between golden citrine tones and violet amethyst tones. The cutting style is faceted, with an excellent polish that allows the stone to present crisp step facets and a broad table for controlled light return. The clarity grade has been assessed as very very slightly included, evaluated at eye level, and there has been no enhancement applied. This ametrine originates from Brazil, and it is offered with the provenance and quality standards associated with The Natural Gemstone Company.

The stone displays internal characteristics that together form an unmistakable signature, and these inclusions are central to the gem character. A primary feature is the finely developed color interface, a planar zone where the citrine and amethyst colors meet. This boundary is unusually well defined in this piece, and it is accompanied by subtle growth zoning that runs parallel to the step facets of the emerald cut. Within those zones, one can observe very fine, oriented inclusions that appear as needlelike and tubular features under magnification, and these linear inclusions align with the crystallographic growth direction. Scattered among the linear features are minute two phase fluid inclusions that present as tiny, reflective points when the stone is tilted under light. Together the linear and fluid inclusions create faint internal striations and a layered depth that accentuates the bi color separation. These inclusions are not concentrated in a single location, they are distributed in a way that reinforces the natural zoning, so the stone reads as a coherent, naturally zoned ametrine rather than an assemblage of unrelated features.

The inclusions are small enough to preserve the gem as very very slightly included at eye level, yet they contribute to a unique visual signature that is apparent to both gemologists and discerning collectors. The linear inclusions interact with light to produce subtle internal reflections that enhance the perceived depth of the color zones, and the two phase inclusions act as pinpoint highlights when the stone is moved. The emerald cut was selected to emphasize the clean color transition and to allow the planar growth features to be viewed in a controlled fashion, with long step facets that reveal the internal architecture without distracting scintillation. From a practical standpoint the inclusions do not compromise the structural integrity of the gem, and given the excellent polish and careful facet alignment, the stone presents well in settings that require a stable and elegant profile. This combination of natural zoning, oriented needlelike features, and dispersed fluid inclusions gives the ametrine an individual fingerprint, a clear internal map that confirms natural formation and Brazilian origin.

For professional use and for collectors seeking a specimen with distinctive internal character, this ametrine offers a balanced presentation of color, clarity, and natural inclusions. The gem is offered by The Natural Gemstone Company with transparent specification of weight, cut, dimensions, clarity, color intensity, polish, enhancement status, and origin. The interplay between the golden and violet zones, reinforced by the oriented inclusions and subtle fluid features, creates an unmistakable signature that is best appreciated when the stone is examined both face up and under direct light. The result is a naturally occurring bi color ametrine that combines visual appeal with the telltale internal markers of genuine Brazilian material, rendered in a precise emerald cut that preserves and highlights the stone character.