derbyshire spar การใช้

• In the UK Blue John, or " Derbyshire Spar ", is found only in Blue John Cavern and the nearby Treak Cliff Cavern.
• There are several varieties of this spar dash such as Canterbury spar, sharp-dash, sharpstone dash, thrown dash, pebble stucco, Derbyshire Spar, Yellow spar, golden gravel, black and white, and also sunflower.
• The alabaster of Nottinghamshire and Derbyshire is found in thick nodular beds or " floors " in spheroidal masses known as " balls " or " bowls " and in smaller lenticular masses termed " cakes . " At Chellaston, where the local alabaster is known as " Patrick, " it has been worked into ornaments under the name of " Derbyshire spar "  a term more properly applied to fluorspar.