Related Clues:

• In one part of the country there's a very soft sort of stone
• Hard mineral perhaps unexpectedly cracked open by one
• Blue birthstone
• Idiot, before engagement, getting quietly taken for stone
• Turns up as father gets to secure the services of one of The Stones
• Undermine engagement taking pressure for stone
• Gem of a park with parking in English county
• ___ lazuli (blue gemstone)
• __ lazuli: blue gem
• I, perhaps (anag) — a stone ...
• Stone Age pottery, possibly first pieces found in county
• Shade akin to royal blue
• Jewel I perhaps must change
• Sky-blue colour
• Rock used to make ultramarine