Related Clues:

• Rock; cherry seed
• Boulder or pebble
• Solitaire, e.g
• Durable building material
• Garden path piece
• Hearth material
• World's first national park
• Curling slider
• Emerald or diamond
• Ruby or pearl
• Oscar nominee for 'Platoon'
• Polished stone
• Lapidary's specimen
• It may be cut or paste?
• Pearl Margaret picked up