Nephrite Jade Ring - A Glowing Green Colored Gemstone Nephrite Jade is a glowing green color jadeite mineral, which is comprised of calcium, magnesium, and iron silicate. This glowing gemstone is famous for amazing shades of green that range from pale to dark green and sometimes represent other colors also, such as white, yellow, or brown. Although it is comparatively a hard gemstone with a hardness of 6 to 6.5 on the Mohs scale, which makes it suitable for everyday wear, the smooth texture and density of Nephrite jade make it highly preferable for designing complex designs. This astonishing green-colored gemstone is found in various regions around the world, and the most famous places include China, Russia, New Zealand, and the United States.