Features plum purple-red in indoor lighting, but navy in natural light. Please consider the changing colour properties before purchasing. Large Oval Synthetic Corundum emulating Alexandrite 9ct Gold frame. Originally from Russia they were an extremely prized stone for their colour change properties but mines were considerably exhausted from the 1930s. These days a natural alexandrite is a rarity and fetches high values, however several synthetics have been made throughout the 1900s. NOTE: Synthetic Corundum have colour change properties.