Use the excerpt to answer the question.

Opals come in a variety of colors, and they range from opaque to transparent. The most desirable opals are known as the precious opals. They have a special iridescent quality. As you move the opal under light, it shows a spectrum of colors.

Which words provide the best context clues for the meaning of iridescent?

"opals, special, precious"

"variety, light, spectrum of colors"

"transparent, variety, opals"

"opaque, quality, desirable"

"variety, light, spectrum of colors"

The words "variety, light, spectrum of colors" provide the best context clues for the meaning of iridescent.

The correct answer is "variety, light, spectrum of colors." These words provide the best context clues for the meaning of iridescent. In the excerpt, it mentions that as you move the opal under light, it shows a spectrum of colors. This suggests that the opals have a play of colors that changes as they are viewed from different angles, which is typical of iridescence.