Related Clues:

• Crown sparkler
• Tourmaline or amethyst
• Setting filler
• Emerald, for one
• Little masterwork
• Idaho, the -- State
• Layered rock
• Sherlock's Blue Carbuncle, for one
• Someone or something special
• Ritzy rock
• Ruby or emerald
• It goes in a setting
• Rock cavity
• It may be cut or paste
• Birthstone, e.g.