Topaz is a high temperature mineral that is often found in igneous rocks. Topaz comes in many different colors including yellow, brownish-yellow, pink, green, orange, colorless and blue. The dark blue topaz is called London Blue topaz while the light blue is called Sky Blue topaz. Topaz has been prized as a gemstone throughout the ages. Blue topaz may be found along the western coast of North America but the primary source remains South America and Russia. Blue topaz may also be used as a birthstone for November, but it is one of several options.