Transforms from greenish blue in daylight to pink or red in indoor light. Color change is caused by slight impurities of the element chromium. It shows a clearly visible pure hue color change such as green/blue in daylight to pure red in incandescent light.
Discovered in Russia in 1830.
Use in jewelry:
Very rare and valuable gem, until recently was extemely difficult to obtain due to rarity. However, new sources in Brazil and Tanzania have made it more mainstream.
8.5 (1 softest to 10 hardest)
Clean with warm water and mild soap. Stable in steam or ultrasonic cleaning.