Collectors bi-color 16.35ct untreated Grandidierite cabochon

The color of this rare gemstone flows through waves of blue green and white with swirling saturation under a beautifully polished liquid luster. It measures an impressive 18.4mm x 13.5mm x 7.9mm, and its swirling color palette is as unique as a fingerprint. This gem was sourced from Madagascar, and is fully natural with no treatments.