Hard glassy red, yellow or green mineral, used as a gemstone

Let's find possible answers to "Hard glassy red, yellow or green mineral, used as a gemstone" crossword clue. First of all, we will look for a few extra hints for this entry: Hard glassy red, yellow or green mineral, used as a gemstone. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.