Imagine holding in your hand a kind of opal stone that has the magical power to show you all the colors of the rainbow with just one look. I am sure you will agree that the sight can be pretty overwhelming. Opal is just that. A precious stone primarily found in mining areas in Southern Australia and quite a few from Nevada all the way to Czechoslovakia among others, opal reflects a multitude of colors that gives the impression you are looking at the colors of a rainbow on close range. The first opal mines, however, were found in what is currently called Eastern Slovakia, but its well has long since run dry. But if you are looking for fire opal, these are mostly found in Mexico. White, also known as milky opal, and black ones are more abundant in the Australian Opal Ring.