What gives gemstone their color?

Answer 1

Gemstones derive their color primarily from the presence of trace elements and impurities within their crystalline structure. For instance, the presence of chromium gives emeralds their green hue, while iron can impart yellow or brown tones in certain stones. Additionally, the way light interacts with the gemstone's internal structure—through absorption and reflection—also plays a crucial role in determining its color. Other factors, such as the gemstone's cut and treatment, can further enhance or alter its appearance.