Related Clues:

• Stone that's largely silicon
• Shimmering stone mate put on ring
• Gemstone discovered on Mars
• Hydrated gemstone
• The Olympic Australis is the largest one in the world
• Cabochon stone
• The Empress of Australia, e.g
• Silica seen in old china
• Stone circle located by mate
• Pendant stone
• "Fiery" gem
• Official precious gemstone of Nevada
• Australian mine yield
• Gemstone of silica
• Scorpio's birthstone