Possible Clues:

• Perhaps I could be turned to stone
• A priest in the English country till all is blue
• It costs precious little to rent a priest from South Africa
• A gem; I, perhaps (anag.)
• Precious stone brought Greek poetess endless anger
• Perhaps I turned blue
• There's a priest in that English county till all is blue
• Precious stone, when held up, has sparkle, reportedly
• Corundum gemstone
• Bright blue