22.68 Ct. Bi Color Ametrine from Brazil

This offering from The Natural Gemstone Company centers on a single, transparent 22.68 carat asscher octagon shaped bi color ametrine, presented as a precision faceted gemstone with dimensions of 17.46 by 17.19 by 12.00 millimeters. The asscher cut emphasizes symmetry and step faceting, creating a pronounced hall of mirrors effect that interacts with the stone s natural color zoning, and the generous carat weight imparts immediate physical presence that is evident in photographs and in hand. The stone displays vivid color intensity across the amethyst and citrine ranges, transitioning between deep purple and warm golden yellow with clarity described as very very slightly included when evaluated at eye level, and an excellent polish that produces strong reflected light return. Originating from Brazil and subjected to responsible heat treatment to stabilize and enhance its colors, this ametrine combines size, optical quality, and craftsmanship in a manner that merits consideration by collectors, bespoke jewelers, and connoisseurs seeking notable specimens.

The 22.68 carat weight is the most significant attribute in assessing rarity and value for this ametrine, because carat weight scales non linearly with rarity and market value for colored gemstones, particularly for varieties that typically occur in smaller sizes. Large ametrine crystals of gem quality that yield clean, transparent material suitable for an asscher cut are uncommon, and the retention of vivid bi color contrast at this scale further reduces available supply, creating upward pressure on value. In practical terms, per carat pricing for ametrine is markedly higher for stones in the tens of carats compared with those under five carats, assuming comparable color saturation and clarity, because experienced buyers and investors prize both the visual dominance of a larger table and the relative scarcity of well preserved large rough. The asscher cut itself is a prudent choice for a stone of this weight, as its pavilion and step facets allow cutters to maximize face up size and maintain proportionate depth, conserving carat weight while producing strong geometric reflections that showcase the bi color effect without introducing excessive windowing or light leakage.

Beyond weight, the technical characteristics of this piece reinforce its value proposition, because clarity graded as very very slightly included at eye level indicates that inclusions are minimal and do not impede the gem s transparency or its ability to exhibit color separation and brilliance. The excellent polish assures crisp facet junctions and minimal surface disturbance, which are essential for the asscher cut s performance, because any polish deficiencies are readily visible on step faceted styles that rely on broad, mirror like facets. The provided dimensions confirm a substantial face up area, seventeen point four six by seventeen point one nine millimeters, with a depth of twelve point zero zero millimeters that supports the asscher s signature deep pavilion geometry, and these proportions contribute to the gem s optical return and stability when set. Heat treatment is a common and accepted enhancement for ametrine to optimize color distribution and intensity, and when transparently disclosed, as it is for this specimen, it does not negate intrinsic rarity related to size, clarity, and origin, in this case Brazil, a locality known for producing notable ametrine specimens but not frequently yielding material of this magnitude and clarity.

For application and stewardship, the 22.68 carat asscher octagon bi color ametrine is most suitable for use as a center stone in large scale ring designs, cocktail rings, pendant statements, or as a museum quality single in a collection, where the weight contributes directly to presence, tactile sensation, and perceived value. Because of the size and depth, secure setting considerations should include multi prong designs with a supporting gallery, flush bezels for additional protection, or custom fabrication that distributes stress across the girdle, and choice of metal can be guided by the bi color character, with warm gold alloys complementing the citrine tones and white metals providing a visual contrast that emphasizes the purple facets. From an acquisition standpoint, buyers should consider the long term value implications of the weight combined with the stone s natural transparency and vivid color, obtaining formal documentation and appraisal for insurance and provenance when desired, and The Natural Gemstone Company can furnish additional high resolution imagery, exact weight and dimension certification, and origin documentation upon request to support evaluation and bespoke setting planning.