Related Clues:

• Onyx, e.g.
• Fine print, perhaps
• Agate variety
• Striped quartz
• Quartz type
• It might make a cameo appearance
• It makes a cameo appearance
• Semi-precious stone
• Stone used for jewelry
• Form of quartz
• Variety of quartz
• Banded gem
• Colorful chalcedony
• Multi-colored quartz
• Black stone