Which gemstone is given its colour by titanium?

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pmiranda2857 | High School Teacher | (Level 1) Educator Emeritus

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A gemstone that gets its color from titanium is sapphire, because of the blue color given to it by traces of titanium found in the stone. 

"Most gemstones are allochromatic, meaning that they are colored by impurities or trace elements in their crystal structure. When there are traces of titanium, the stone is a sapphire."