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This 2.53 carat natural sapphire from Diego, Madagascar displays an unusual blend of opalescent teal, blue, and green tones that shift subtly as the stone moves through different lighting conditions. Expertly fashioned in a precision baguette step cut, the gemstone showcases crisp linear faceting and broad reflective flashes that emphasize its architectural form and distinctive color. Completely untreated, this sapphire combines the soft glow of opalescent material with the clean geometry of a step cut, making it especially appealing for modern custom engagement rings and bespoke fine jewelry. Its substantial size, rare coloration, and precision cutting make it an exceptional choice for collectors and designers seeking a unique natural sapphire.