Related Clues:

• Playground marble
• Striped stone
• Onyx, essentially
• Box score print size, perhaps
• Marble
• Colorful stone
• Fine print type
• Chalcedony variety
• Small print
• Marble type
• Rock composed of quartz
• Onyx, e.g.
• Fine print, perhaps
• Striped quartz
• Variety of chalcedony