Related Clues:

• Ones that are holy but hard
• Are canonised ones the hard ones?
• Pebbles and boulders
• Don't throw them at glass houses
• More than one rock group?
• Group of small rocks
• Looks for a vein
• Gems and gravel
• Excavation sites
• The rolling musicians in pits?
• Bores for ore
• 'Back to the salt --'
• Where Harold Larwood started work
• Dwight, who sounded more suited to curling than high jumping
• They are curled on the rink