Related Clues:

• Semi-precious stone
• Whitish gemstone
• Geyserite, e.g.
• Thunder egg component
• Fall gemstone
• October gem
• Play-of-color stone
• Heroine of ''Because of Winn-Dixie''
• Birthstone for some
• "Fire" stone
• Stone made of hydrated silica
• Silicon dioxide
• A birthstone
• It's a form of hydrated silica
• Amethyst, e.g.