Crossword Heaven

Answer: QUARTZ

QUARTZ is a crossword puzzle answer that we have spotted 20 times.

• Hard rock
• 7 on the Mohs scale
• Tiger's-eye, essentially
• Crystalline mineral
• Onyx or amethyst
• What a crystal ball gazer sees
• Hard mineral
• Amethyst or jasper
• Silica mineral
• Amethyst, e.g.
• Watch crystal, maybe
• Earth's most abundant mineral
• Silicon dioxide
• Sand ingredient
• Amethyst or citrine
• Citrine or amethyst
• The crystal in some crystal balls
• Rose ___: reddish mineral
• Watch-crystal mineral
• Transparent rock