19.43 Ct. Bi Color Ametrine from Brazil

This transparent bi color ametrine presents as a substantial round gem weighing 19.43 carats, with precise dimensions of 17.90 x 17.98 x 13.11 mm. The stone is faceted with a mixed brilliant cut, a choice that balances scintillation and color return across the surface and through the pavilion. Clarity has been evaluated at eye level as very very slightly included, offering clean visual appeal with minimal internal features that do not detract from the gem's overall presence. Color intensity is medium, allowing both the amethyst and citrine tones to remain distinct yet harmonious within the single crystal, and the polish grade is excellent, which contributes to crisp facet junctions and lively surface reflections. The piece has undergone heat treatment, a standard and stable enhancement that optimizes color distribution, and it was sourced from Brazil, a region known for producing well formed ametrine crystals. The Natural Gemstone Company presents this stone with full specification to assist in planning design, setting, and appraisal.

The mixed brilliant cut emphasizes both the round outline and the internal light performance, making this gem visually adaptable across diverse jewelry types. Faceting has been executed to yield balanced flash and dispersion, which enhances the bi color effect without overpowering either tone, so the stone reads as nuanced and dynamic in various lighting conditions. In natural daylight the separation between purple and yellow hues is evident, while in incandescent environments the warmth of the citrine side comes forward in a complementary fashion. These optical characteristics make the gem well suited to larger center stone applications where the wearer may want a focal piece for formal occasions, and equally appropriate for striking pendants or statement rings intended for everyday wear. The substantial dimensions accommodate a range of mounting styles, with prong settings that maximize light entry, bezel options that emphasize a modern architectural look, and halo designs that can refine perceived size and transition the piece smoothly into classic or contemporary aesthetics.

Beyond aesthetic attributes, this ametrine offers practical versatility in terms of wearability and care. As a variety of quartz, ametrine typically rates seven on the Mohs scale, providing good resistance to everyday scratching while still requiring reasonable protection from hard knocks and abrasive surfaces. The heat treatment applied is stable and commonly used to achieve balanced color, and routine care consisting of warm soapy water and a soft brush is sufficient for cleaning, while ultrasonic or steam treatments are best used with caution and under expert guidance depending on the final setting. The gem's clarity and polish support high end finishing in metals such as yellow gold, rose gold, white gold, and platinum, each paired metal bringing out different aspects of the dual color. For casual contexts the gem provides an expressive, wearable look that complements relaxed attire through its lively color play, and in formal contexts the same qualities translate into a sophisticated focal point that reads as refined and intentional.

Specifications are provided to facilitate design decisions and verification, and The Natural Gemstone Company is available to discuss sourcing documentation, custom mounting options, and any additional measurements or images required for production. The combination of a substantial 19.43 carat weight, round outline, mixed brilliant faceting, very very slightly included clarity at eye level, medium color intensity, excellent polish, and Brazilian origin defines a gemstone that is both visually impactful and adaptable to a wide range of stylistic environments. Whether the intent is to create a singular occasion piece with refined presence or a distinctive everyday signature item that remains polished and wearable, this bi color ametrine delivers a blend of color, proportion, and workmanship that supports both casual and formal settings with equal authenticity.