5.04 Ct. Ametrine from Madagascar

This specimen is a transparent 5.04 carat cushion shaped bi color ametrine with dimensions of 10.85 by 10.77 by 7.92 millimeters, prepared for collectors and connoisseurs who prioritize optical precision. The cutter selected a mixed brilliant cut to balance scintillation and color separation, combining a faceted crown arrangement that emphasizes pavilion brilliance, with a modified brilliant pavilion that preserves color zoning contrast. Clarity is graded very very slightly included at eye level, which in practice means only minor feathering and pinpoint inclusions are present under direct observation, and these do not interfere with light return or color zoning. Color intensity reads as light, with a delicate transition between pale amethyst violet and warm citrine yellow, and the surface has been given an excellent polish to maximize facet reflectivity and minimize surface luster losses. The piece has undergone heat treatment as an enhancement to stabilize tone and reduce unwelcome greenish cast, and the mineral origin is Madagascar, a source known for producing high quality ametrine crystals with clean zoning and good crystallographic integrity.

Ametrine is a bicolored variety of quartz that displays two distinct hues within a single crystal due to differential oxidation states of iron during growth, and this example exhibits that separation in a way that is materially rare for its size. At 5.04 carats many ametrines show either muted color or increased windowing, yet this stone retains a measurable band of violet and a discernible citrine field across the pavilion, which allows for both color play and brilliance under varied lighting. Compared to typical commercial ametrine that is under 2 carats or that relies on deep color only, this stone occupies a narrow class of larger bi color material where color zoning remains defined while clarity and cut are preserved. Rarity is therefore twofold, both in scale and in the clarity of the color interface, which makes this gem an exceptional candidate for collectors who seek specimens that can be set without sacrificing the natural bicolor narrative.

The mixed brilliant faceting strategy employed here is technically deliberate, the crown facet angles were optimized to trade off dispersion and color contrast so that the amethyst zone does not dominate and wash out the citrine zone during head on viewing. The pavilion depth of 7.92 millimeters supports a refractive geometry that enhances light return, avoiding the typical undercut pavilion that produces windowing in larger quartz gems. The cushion outline with slightly rounded corners was chosen to preserve the maximum rough weight while creating a broad table facet that anchors the color plane, and the girdle thickness has been left consistent to facilitate secure bezel or prong mounting without inducing stress points. The excellent polish is evident across facet junctions, and the very very slightly included clarity grade means the piece is suitable for direct mounting where loupe grade inspection confirms minimal obtrusive inclusions. For longevity and optimal presentation we recommend settings that protect the girdle and pavilion, and that position the gem so that light can enter and interact with the color zones rather than concealing the citrine field against a dark mounting background.

For clients interested in complementary materials, information on White Opal is provided to assist in design pairing and selection. White Opal is a light body tone opal characterized by a pale white to off white ground color that can display play of color when it is precious opal, the material is a hydrous form of silica with variable water content and a typical Mohs hardness around five and a half to six and a half. White Opal pairs well with pale colored gems, as its subdued body provides a neutral backdrop that can accentuate the violet and yellow contrast of ametrine, however it requires more protective settings and care in daily wear due to its lower hardness and potential sensitivity to abrupt temperature changes and strong solvents. At The Natural Gemstone Company we document enhancements and origins explicitly, and this ametrine from Madagascar is offered as a rare larger example of bi color quartz with precise faceting and stable treatment. For bespoke mounting suggestions, matched pair inquiries, or technical certificates for design documentation please contact our gem specialists who can provide facet maps, light performance notes, and setting recommendations tailored to your project.