80.23 Ct. Bi Color Ametrine from Ceylon (Sri Lanka)

One beautiful transparent 80.23 carat cushion shape bi color ametrine, dimensions 28.72 by 27.84 by 15.43 millimeters, mixed brilliant cut, clarity grade eye clean as evaluated at eye level, vivid color intensity, excellent polish, enhancement heat treated, origin Ceylon Sri Lanka. This specimen combines the complementary hues of amethyst and citrine in a single crystal, presenting deep violet and warm golden brown transitions that are well defined across the cushion surface. The mixed brilliant faceting strategy optimizes light return and dispersive effects, allowing the bi color zoning to read strongly from multiple viewing angles, while the excellent polish produces a lively, glassy luster that emphasizes the stone's transparency. At 80.23 carats this ametrine is notable for its size, and an eye clean clarity grade at this scale is a rare and desirable attribute for collectors and connoisseurs alike.

As specialists at The Natural Gemstone Company we present this ametrine as both an aesthetic and technical offering, suitable for a statement ring or as the centerpiece of a bespoke creation, and valuable to an educated buyer for several reasons. First, the combination of substantial carat weight, vivid color intensity, and eye clean clarity enhances both visual impact and market desirability. Second, the disclosed heat treatment is a common and accepted enhancement in quartz family gems, performed to accentuate desirable tones, and it is stable under normal wearing conditions provided the gem is not exposed to extreme heat or harsh chemicals. Third, the Sri Lankan provenance adds provenance value, coming from a region with a long history in the international gem trade, and this specific piece has been cut to retain weight while maximizing color play. From a durability perspective ametrine, as a variety of quartz with a Mohs hardness around seven, offers good wearability with sensible precautions against hard knocks and prolonged sun exposure. Over the years the stone will continue to captivate due to its dramatic bi color contrast, resilient polish, and exceptional size, making it a long lasting visual and investment quality asset for a discerning collector. For further details, imaging, or to discuss setting options contact The Natural Gemstone Company.