Chrome Diopside is a beautiful green stone. It is highly refractive which gives it great sparkle (nearly twice the refraction index compared to emerald). Diopside is found all over the planet, but the rare top-gem-quality chrome diopside is found in Siberia. In Siberia, it is too cold to mine during the winter, making an extra task of keeping production levels even throughout the year. On the MOHS scale of hardness, it is rated a 6-6.5, and it is a much better choice for pendants and earrings.