Pendant stones (5)

I believe the answer is:

opals

(Other definitions for opals that I've seen before include "Translucent gemstones" , "Semi-precious stones of milky or bluish colour" , "Milky sparkling gemstones" , "Milky gemstones with delicate colours" , "Milky-white stones" .)

I've seen this clue in The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.