Amazon.com Product Description: This 12x10mm faceted oval of chrome diopside has a pure rich dark green color that is absolutely captivating. This loose gemstone originates from Russia and has a weight of 5.15 carats. Chrome diopside is a rare and beautiful gemstone with a high refraction index (nearly twice that of an emerald), which gives it an amazing sparkle. Its vivid deep green color is completely natural, not heat-treated or irradiated. Chrome diopside is a relatively soft stone, with a rating of 5.5-6 on the Mohs scale. Worn with reasonable care, it is perfectly suitable for a jewelry setting.
