Sotheby's is thrilled to present one of the world's largest polished diamonds, The Golden Canary. Weighing an astounding 303.10 carats, it is the largest flawless or internally flawless diamond ever graded by the GIA. Previously coming in at just over 407 carats, the “Incomparable Diamond" was cut into its classic pear-shape to reveal a deeper color and brighter hue.