4.37 Ct. Ametrine from Ceylon (Sri Lanka)

This transparent bi color ametrine offered by The Natural Gemstone Company is an exceptional specimen for collectors and connoisseurs, weighing 4.37 carat and measuring 12.55 x 9.97 x 6.34 mm. The oval shape presents a graceful outline that allows a broad view of the internal color zoning, and the stone has been cut to maximize its optical performance. Evaluated at eye level, the clarity grade is eye clean, which means there are no visible inclusions to interrupt the passage of light or to distract from the gem and its vivid color intensity. The surface finish is an excellent polish, rendering each facet crisp and allowing unhindered reflection and refraction. This ametrine has been heat treated, a responsible and commonly accepted enhancement in the trade that stabilizes and intensifies the purple and golden hues. The stated origin for this piece is Ceylon Sri Lanka, and provenance contributes to the gem story for educated buyers who value traceable supply and regional characteristics. The combination of transparency, vivid coloration, and careful finishing makes this ametrine both visually striking and technically sound, qualities that appeal to those who purchase gemstones for both aesthetic and investment reasons.

The mixed brilliant cut used for this oval ametrine is integral to how the gem communicates light and color. By combining brilliant style facets on the crown with complementary facet geometry on the pavilion, the cutter balances brilliance and color separation, so that flashes of white light and colored light are presented with clarity and vivacity. The oval outline provides elongated table proportions that let the viewer read the bi color zoning at a glance, while the facet architecture creates repeated internal reflections that animate a spectrum from warm golden amber to cool amethyst purple as the stone or the observer moves. The crown facets act to break incoming light into scintillation, providing lively pinpoint flashes, while the pavilion facets channel light back through the body of the gem, reinforcing saturation and depth. Excellent polish reduces surface scatter, sharpening the contrast between the two colors and enhancing the apparent transparency of the stone. In an eye clean ametrine, this precise cut means that light paths are unimpeded by internal characteristics, so brilliance and color interplay remain pure and energetic, qualities that trained gem buyers recognize as indicators of superior cutting and yield.

For the educated buyer assessing value and versatility, this ametrine stands out for several reasons. It occupies a weight class at 4.37 carat that is large enough to command attention in rings and pendants, yet its oval proportions lend themselves to elegant, wearable settings that preserve light performance. The vivid color intensity combined with eye clean clarity elevates its market desirability, because color and clarity are the primary determinants of visual appeal and rarity in colored stones. The heat treatment used here is disclosed and stable, and it enhances the stone without compromising long term integrity, a point that matters to collectors who expect transparent disclosure. For those interested in other gems, we also offer White Opal, which is a classic opal type characterized by a light body tone with play of color across the surface. White Opal typically displays a delicate background coloration that can magnify flashes of red blue and green, and it is best appreciated in cabochon cuts that showcase its iridescence. Whether you are choosing this ametrine for a signature ring or comparing it with a White Opal for a complementary design, The Natural Gemstone Company can provide additional high resolution images, cut and proportion information, and independent lab documentation on request, ensuring that your purchase is informed, transparent, and aligned with your collection objectives.