At almost 10,000 feet above sea level, villagers in northern Ethiopia have uncovered a seam of pure black opal buried within hand-dug tunnels. The site, hidden in Wollo Province’s rugged terrain, is ...

An opal is a very beautiful gemstone that reflects different arrays of color, this is beacause of the water content in the gemstone. Opal comes in the following color patterns such as, colorless, ...