Why does iron, when added to quartz, cause the purple color of amethyst?
A) The presence of trace constituents can affect color.
B) Iron overpowers the silicon in quartz.
C) Amethyst is formed under extremely hot conditions.
D) Iron is red and silicon is blue, making purple.

Question

Quizplus · Accepted Answer

The presence of iron as a trace constituent in quartz can affect its color, causing the purple hue seen in amethyst.

Why Does Iron, When Added to Quartz, Cause the Purple