4.50 Carat Natural Loose Bicolor Ametrine Stone Cushion Cut Brazilian Gemstone

Mined from the famous gem-bearing deposits of Brazil, this 4.50 Carat Natural Loose Bicolor Ametrine displays a distinct, naturally occurring dual-zone color balance, seamlessly uniting the warm golden-yellow of citrine with the cool, regal purple of amethyst in a single natural crystal. Precision-crafted into an elegant cushion cut, its soft rounded perimeter and strategically angled pavilion facets work in harmony to accentuate the crisp color division while producing brilliant edge-to-edge scintillation across both zones. The gemstone boasts superior eye-clean clarity and exceptional crystal transparency, allowing light to move fluidly through both color sectors without dark extinction or cloudiness. Completely natural, unheated, and untreated, this pristine 4.50-carat Brazilian ametrine offers a striking, balanced contrast, making it a captivating centerpiece for a custom cocktail ring, an East-West set pendant, or an elite gemstone investment collection.