6.81 Ct. Ametrine from Madagascar

One beautiful transparent 6.81 carat fancy shape bi color ametrine, with dimensions of 17.68 x 8.10 x 7.20 mm, presents an immediate visual impact that is rare for a stone of this class. Cut to a refined step cut, the proportions emphasize length and clarity, creating broad parallel facets that deliver elegant flashes rather than a brilliant scatter. The medium color intensity allows both the amethyst lavender and the citrine golden zones to read distinctly, while retaining a pleasing balance that reads well in natural and artificial light. Clarity is graded as very very slightly included, evaluated at eye level, which means the gem reads as effectively eye clean to most observers yet retains the natural inclusions that confirm its natural origin to a trained eye. An excellent polish enhances the table and facet junctions, enabling crisp light return and a satiny surface that complements the step cutting style. This combination of substantial carat weight, crisp cutting, and transparent body make this ametrine an immediate candidate for a centerpiece in a high end ring, pendant, or brooch, where the stone can be oriented to maximize its bicolor presentation.

From a gemological perspective, this ametrine offers attributes that an educated buyer will recognize and value. Ametrine is a naturally occurring bicolor quartz showing both amethyst and citrine hues, produced by differential oxidation states of iron within the quartz crystal during formation. The medium color intensity in this piece is ideal for a statement stone, strong enough to convey presence across a room, yet restrained enough to allow the step facets to reveal subtle internal architecture and satiny luster. The step cut further accentuates clarity, because its broad facets do not break color into many small scintillating flashes, rather they create planes of color and light that emphasize internal clarity and color zoning. The clarity grade of very very slightly included, evaluated at eye level, indicates that inclusions are minute and do not detract from visual performance. For the discerning buyer who prioritizes a clean window to the stone, this is a significant advantage, because it allows the wearer to enjoy uninterrupted fields of color and sustained light return, while still retaining the natural character that collectors appreciate.

Enhancement disclosure and origin are important for valuation and trust, and this gem is heat treated, a stable and commonly accepted enhancement that subtly optimizes color without degrading the crystal structure. Heat treatment is widely used in quartz varieties to refine hue and reduce unwanted color tints, and when fully disclosed as here, it supports transparent trade practices. The origin of this ametrine is Madagascar, which adds provenance interest for collectors and designers who track geographic sources. Madagascar has produced fine transparent gem material across a range of species, and material from this locale can present slightly different zoning and crystal habit compared with more classical ametrine sources, making this specimen appealing to someone building a curated collection. The Natural Gemstone Company stands behind the description and disclosure, offering a gemstone with documented attributes that suit both investment minded buyers and creative design professionals.

In practical terms, the stone size of 6.81 carat and rectangular dimensions make it especially well suited to designs that showcase elongated silhouettes, such as solitaire rings with a low or protective setting, dramatic pendant designs that allow rotation to reveal bicolor demarcation, and bespoke cocktail rings where setting metal and accent stones can be chosen to complement either the warm citrine zone or the cool amethyst zone. Because the surface finish is excellent, minimal re polishing should be required, and the step cut makes repair and re setting more straightforward than heavily faceted brilliant cuts. Care recommendations are standard for quartz, avoid prolonged exposure to harsh chemicals and extreme heat, and clean with warm soapy water and a soft brush. For the educated buyer seeking a statement piece that combines transparent clean appearance, significant carat weight, deliberate step cutting, and responsible disclosure, this 6.81 carat bi color ametrine from Madagascar offered by The Natural Gemstone Company represents a compelling blend of aesthetic impact and gemological integrity.