Blue John stone

Target entity: Blue John stone
Context triple: [Castleton, knownFor, Blue John stone]

• A. Kentish ragstone
  Kentish ragstone is a hard, grey limestone from Kent, England, historically quarried for major building works including many medieval fortifications and churches.
• B. Alabaster
  Alabaster is a suburban city in central Alabama, known as part of the Birmingham metropolitan area and one of the state's larger, rapidly growing communities.
• C. Tuckahoe marble
  Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
• D. Fairfax Stone
  Fairfax Stone is a historic boundary marker in West Virginia that denotes the traditional source of the North Branch of the Potomac River and once defined colonial land grants.
• E. Collyhurst sandstone
  Collyhurst sandstone is a distinctive red Triassic sandstone historically quarried in Manchester, England, and widely used in local building and architectural stonework.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Blue John stone
Target entity description: Blue John stone is a rare, banded variety of fluorite prized as a decorative gemstone, found almost exclusively in the caves near Castleton in Derbyshire, England.

• A. Kentish ragstone
  Kentish ragstone is a hard, grey limestone from Kent, England, historically quarried for major building works including many medieval fortifications and churches.
• B. Alabaster
  Alabaster is a suburban city in central Alabama, known as part of the Birmingham metropolitan area and one of the state's larger, rapidly growing communities.
• C. Tuckahoe marble
  Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
• D. Fairfax Stone
  Fairfax Stone is a historic boundary marker in West Virginia that denotes the traditional source of the North Branch of the Potomac River and once defined colonial land grants.
• E. Collyhurst sandstone
  Collyhurst sandstone is a distinctive red Triassic sandstone historically quarried in Manchester, England, and widely used in local building and architectural stonework.
• F. None of above. chosen