Oval Natural Red Africa Ruby for Jewelry

      Africa Ruby usually in big size and nice color but not perfect clarity.  It mainly comes from Northeast metabuto mauntain. Ruby is the red variety of the mineral corundum, one of the hardest minerals on Earth, of which the sapphire is also a variety. Pure corundum is colourless. Slight traces of elements such as chrome, iron, titanium or vanadium are responsible for the colour. These gemstones have excellent hardness. On the Mohs scale their score of 9 is second only to that of the...