6.81 Ct. Ametrine from Madagascar

This listing presents one transparent 6.81 carat fancy shape bi color ametrine, with precise dimensions of 17.68 x 8.10 x 7.20 millimeters, a classic step cut, and an excellent polish. The stone displays a medium light color intensity, with the natural zoning between purple amethyst and golden citrine tones running along the length of the gem, a characteristic that defines ametrine as a collector and design favorite. Clarity is graded as very very slightly included, evaluated at eye level, which for an educated buyer indicates that the inclusions do not detract from the overall transparency and are not readily apparent in typical presentation or jewelry settings. The piece has undergone a controlled heat treatment enhancement, a standard and widely accepted practice to stabilize and optimize color in quartz family stones. This ametrine originates from Madagascar, a locality known for producing well defined bi color quartz specimens, and The Natural Gemstone Company affirms the provenance and the described treatment in our quality documentation.

When assessing cut and clarity in relation to value, the step cut used here intentionally emphasizes color zoning and broad face up color rather than intense scintillation. Step faceting creates long, mirror like facets that offer clear, even color windows and linear reflections, which is particularly effective for showcasing a two tone gem. The very very slightly included clarity grade means that under moderate magnification some natural features may be seen, yet at normal viewing distance the stone reads as eye clean to most observers. The excellent polish further contributes to clean light return and crisp facet delineation, allowing the purple and yellow zones to read distinctly without surface disturbance. Heat treatment in ametrine is generally used to enhance and balance the citrus and violet hues, and it is stable under normal wear conditions. With a Mohs hardness near 7, ametrine is suitable for most types of jewelry, and careful setting choices will protect its elongated profile while preserving the striking color contrast.

In comparative terms the reflective qualities of this ametrine differ in predictable ways from other gemstones in the quartz category, and from bicolor materials more broadly. Ametrine shares a vitreous luster with amethyst and citrine, but because of its bicolor nature and the step cut, light behavior emphasizes broad, plane like reflections rather than the tight scintillation seen in brilliant cuts or in gems with higher dispersion. Compared with amethyst of similar clarity and cut, this ametrine produces a more dynamic face up appearance because two distinct absorption zones provide contrast that changes with viewing angle and lighting. Against citrine, the purple contrast in this ametrine increases perceived depth and makes faceting reflections appear cooler on one end and warmer on the other end. Compared to higher dispersion gems such as garnet or topaz, ametrine exhibits less fire, but its appeal is in color zoning and the way polished step facets create a mirror effect that emphasizes the dual colors. For buyers seeking a gemstone that reads as sophisticated and restrained rather than highly fiery, this ametrine offers an elegant balance between color drama and classic facet reflections.

For an educated buyer considering investment and design potential, this 6.81 carat Madagascar ametrine from The Natural Gemstone Company represents a compelling combination of size, provenance, and visual character. Larger well cut bicolor ametrines with clean appearance are comparatively rare, and the elongated fancy shape is ideal for bespoke ring or pendant designs where orientation of the color split can be used as a compositional element. The stone is ready for precision settings that will protect its edges while allowing the step facets to play with light, and a vertical or diagonal mounting can be selected to favor either the violet or the golden end depending on design intent. We provide full disclosure of the heat treatment and clarity grading, and we recommend standard care procedures for quartz family gems, including avoiding harsh blows and prolonged exposure to high heat. If you require additional images from a particular angle, or a light study to plan bezel or prong work, The Natural Gemstone Company will assist to ensure the stone integrates perfectly into your intended design.