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This 3.60 carat natural parti sapphire from Diego, Madagascar displays an exceptional blend of opalescent teal, blue, and green hues with distinct natural color zoning throughout the stone. Expertly cut in a precision oval mixed cut, it combines strong brilliance with a soft internal glow, allowing flashes of ocean blue, sea-green, and teal to move beautifully across the facets. Completely untreated, this sapphire showcases the unique character that has made Madagascar parti sapphires increasingly sought after for custom engagement rings and bespoke fine jewelry. With its substantial size, vibrant color palette, and excellent proportions, this gemstone is a standout choice for collectors and designers seeking a one-of-a-kind natural sapphire.