Possible Clues:

• Which critic's are the gems?
• Has the cooker got set up with stones?
• Multi-coloured quartzes
• Ste aga up for the stones
• Little stones, as they are around the way in
• Stones to be found in a stage
• Stones that set up 27 across
• Stones that one may get at in time
• How the commander gets upset with the stones
• How the commander gets a setback with the stones