19.74 Ct. Bi Color Ametrine from Brazil

When you are searching for a single stone that ends the quest for the perfect centerpiece, whether you are planning an engagement ring that must be truly one of a kind, a bold cocktail ring, or a rare addition to a collector cabinet, this gem answers that need with authority. This is a transparent bicolor ametrine weighing 19.74 carats, cut in an elegant emerald shape, with dimensions of 20.88 x 13.83 x 8.87 mm. The clarity grade is very very slightly included evaluated at eye level, the color intensity is intense, and the polish is excellent. The stone has been heat treated and its origin is Brazil. At The Natural Gemstone Company we understand that discerning customers want both beauty and provenance, and this ametrine brings both in a single, dramatic package.

The emerald cut makes this ametrine exceptionally well suited to custom jewelry, because the long step facets and rectangular outline create a broad, flat face that displays the striking amethyst to citrine transition like a window into the gem. With a face up dimension of just over 20 millimeters by nearly 14 millimeters, the stone has a commanding presence while remaining balanced and wearable. The substantial depth of 8.87 millimeters gives jewelers ample material to seat the stone securely, whether you choose a bezel setting for a modern, protective silhouette, or a minimal prong or corner set to maximize visible table area and let light travel through the color split. Designers will appreciate how the emerald cut encourages crisp, linear mounting designs, and how the bicolor zoning can be oriented to read vertically, horizontally, or diagonally depending on the mood you want to create.

From a clarity and finish perspective this ametrine is a dream for custom work. The clarity grade of very very slightly included evaluated at eye level means that the stone is remarkably clean to the unaided eye, which is important when crafting pieces where the gemstone is the star. The excellent polish enhances the step facet reflections, producing a refined, mirror like sheen that amplifies the color contrast between the golden citrine zone and the violet amethyst zone. Heat treatment has been applied to stabilize and intensify those colors, a common and accepted practice for many collectors and clients who seek vivid, long lasting hues. Sourced from Brazil, this ametrine carries the provenance that serious collectors value, and it will take center stage in any bespoke design because each movement of the hand will reveal a new interplay of color and light.

Practical considerations for mounting and wear are where size and shape again make this gem especially attractive. At nearly 20 carats and with generous length and width, the stone translates into a strong visual statement on a ring without needing excessive side accenting. For clients seeking an engagement ring that reads as elegant and contemporary, an east west emerald set with low profile prongs or a tailored bezel offers secure daily wear. For cocktail or statement rings, a raised gallery with tapered shoulders will allow light to pass through the emerald cut step facets and showcase the bicolor transition with theatrical effect. The rectangular proportions also lend themselves to pendants, where the stone can hang vertically to elongate the neckline, or lie flat for a bold collar piece. Metal choices are part of the design conversation, yellow gold or rose gold will warm and complement the citrine portion, while white gold or platinum will create a crisp contrast that emphasizes the violet. Because the gem has been heat treated and has a solid polish, normal careful wear is appropriate, and we recommend cleaning with mild soap and warm water and a soft brush, avoiding sudden thermal shock and harsh chemicals to preserve the stone in pristine condition.

At The Natural Gemstone Company we know that clients do not simply buy a gemstone, they commission a story. This ametrine is ideal for those who want a defining focal point, whether your brief is a refined engagement ring that breaks from the expected, a bold cocktail ring, or a museum quality piece for a collection. We provide experienced guidance on setting styles, complementary side stones, and metal choice, and we can arrange bespoke design consultations and CAD visuals to help you visualize the final creation. High resolution images, accurate measurements, and an honest description of enhancements are all part of our commitment, and we will work with you to ensure the mounting secures the stone and highlights its unique bicolor nature. Contact The Natural Gemstone Company to discuss design possibilities, to request additional images or a video of the stone from multiple angles, and to begin the process of transforming this exceptional 19.74 carat emerald cut ametrine into the signature piece that finishes your search.