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7. What gives the gem amethyst its purplish color?

A. Quartz
B. Titanium
C. Oxygen
D. Iron

The answer was not A, got this question wrong.

2 answers

Uuuurrrrggggeeeeennnnnnnttttttt

D.ï¿½Iron
Silicon dioxide. Its purple coloring is usually caused by impurities of iron or manganese compounds.

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