37.91 Ct. Ametrine from Brazil

One outstanding specimen that exemplifies both aesthetic appeal and gemological integrity is this transparent 37.91 carat emerald cut bi color ametrine, offered by The Natural Gemstone Company. Measuring 22.20 x 19.07 x 12.08 mm, the stone presents a generous table and well balanced proportions that highlight its unique color zoning and internal clarity. The emerald cut is executed with precision, producing long step facets that emphasize the gem s broad planes and allow the bi color division to present as a crisp and elegant band of color. This ametrine displays intense color intensity across both the golden citrine hue and the violet amethyst hue, creating a striking visual contrast that remains vivid from multiple viewing angles. For collectors and connoisseurs who appreciate large, statement gems with technical refinement, this piece stands out as a rare and desirable example of what ametrine can achieve when cut and finished by skilled hands.

From a gemological perspective, the stone s clarity is graded very very slightly included, evaluated at eye level, which means that inclusions are minimal and do not detract from the face up appearance when viewed without magnification. The excellent polish contributes to highly reflective facet surfaces, resulting in crisp facet junctions and strong light return that enhance both color saturation and apparent transparency. The gem has been heat treated, a standard enhancement in many colored stones to stabilize and intensify color, and this treatment is disclosed and stable under normal wear conditions. Origin is Brazil, and while ametrine is more commonly associated with South American deposits, this Brazilian provenance is important to note for buyers who track source localities for rarity and traceability. The combination of weight, cut quality, clarity, and disclosed enhancement makes this a gem that both specialists and informed buyers can evaluate confidently.

Color is the defining attribute of ametrine, and this stone s bicolor presentation is particularly well balanced, with a clean transitional boundary that runs across the emerald cut face in a way that enhances symmetry rather than appearing patchy. The warm golden citrine portion and the cool violet amethyst portion both exhibit intense saturation, which is a key value driver because it minimizes the need for larger sizes to achieve visual impact. At 37.91 carats, the gem already commands attention, but its intense color intensity elevates the perceived value further, as well cut, intense color stones remain scarce in the market. For the educated buyer, the interplay of color zoning and clarity is critical, and in this specimen, the very very slightly included clarity allows the colors to present without interruption, while the emerald cut organizes the colors into a refined, architectural composition. The disclosed heat treatment is consistent with industry practice to enhance tone and saturation, and because the treatment is permanent, it does not require special handling beyond normal gemstone care.

Beyond its technical merits, this ametrine is exceptionally versatile in terms of jewelry design and daily wearability. The emerald cut lends itself to both classic and contemporary settings, working equally well as a dramatic solitaire ring for formal occasions and as a central element in a more casual pendant or cocktail ring for everyday elegance. The size and rectangular outline suit both horizontal and vertical mountings, and the clean facet planes make it compatible with bezel, prong, or channel applications, depending on the wearer s lifestyle and security preferences. For an evening look, pair the stone with warm yellow metals to accentuate the citrine tones, or with white metals to allow the violet to take center stage. For daytime or more relaxed settings, a sleek, minimalist mount will showcase the gem s natural zoning while protecting it from impact. Given the excellent polish and high clarity, the gem also photographs exceptionally well, making it an ideal choice for bespoke commissions intended to be showcased in portfolios or online.

At The Natural Gemstone Company we prioritize transparency, accurate grading, and secure provenance, and this ametrine is accompanied by full disclosure of its heat treatment and Brazilian origin to support informed purchasing decisions. For collectors seeking certification, we can assist with independent laboratory reports that document weight, measurements, cut description, clarity observations, color description, treatment, and origin, which further enhances resale reliability and insurance appraisal. Care recommendations are straightforward, clean with mild soapy water and a soft brush, avoid sudden temperature extremes and harsh chemicals, and consider protective settings for everyday wear because of the stone s size. If you have a particular design in mind or wish to review high resolution imagery and additional angles, our specialists at The Natural Gemstone Company are available to guide you through design options, appraisals, and secure shipping. This 37.91 carat emerald cut bi color ametrine represents a rare convergence of scale, clarity, and intense bicolor saturation, a worthy addition to a discerning collection or a striking center for a custom statement piece.