NOUN: “a usually amorphous mineral that is a hydrated silica softer and less dense than quartz and typically with definite and often marked iridescent play of colors and is used especially as a gem” Crossword Clue

We have the answer for NOUN: "a usually amorphous mineral that is a hydrated silica softer and less dense than quartz and typically with definite and often marked iridescent play of colors and is used especially as a gem" crossword clue that will help you solve the crossword puzzle you're working on!