Here is a rare and unusual natural color-change sapphire from a brand new source in Mozambique. The stones from this mine are unlike anything we have seen from anywhere else in the world and supplies are very limited. It has a color-change from chartreuse (yellow-green) in natural light/daylight to golden yellow under incandescent/warm artificial light. This makes it the perfect stone for a collector or connoisseur of special gems. It is completely natural and unheated.