Diaspore: Colour and light Posted August 03, 2021 | By Mikaelah Egan Diaspore derives its name from the Greek word diaspora – meaning ‘to scatter’. The prized colour-change varieties may be better known as Csarite or, formerly, Zultanite. Gem-quality diaspore is best known for its colour change, an optical effect that occurs when different types of lighting interact with the gemstone. In daylight, this stone is usually a greenish colour, that changes to a pinkish brown or even red in incandescent light. Trace elements of titanium, vanadium, iron and chromium within the structure...