Related Clues:

• Kind of quartz
• Precious stone
• This type has just a few points
• Certain marble
• Rock with bands
• -- Fossil Beds National Monument
• Jewelry stone
• Kind of marble
• Semiprecious stone
• Layered mineral
• Chalcedony with black and white bands
• Playground marble
• Striped stone
• Black rock
• Onyx, essentially