The Greenlaws Mine is located approximately 1 km south of St. John's Chapel. Two parallel veins, the Greenlaws East and West were worked by the mine, but the east vein appears to have been far more productive. The Greenlaws East Vein was worked by the Beaumont Company between 1850 - 1884 for lead, and for a short period there-after by the Weardale Lead Company. Attempts to reopen the mine in the 1940's for fluorspar were reportedly unsuccessful. Dunham (1990) reports the presence of a small belt of cavity-bearing flats adjacent to the Greenlaws East Vein at the High Flats horizon in the Great Limestone, along with some in the upper portions of the Scar Limestone. Specimens of amber fluorite are reported to have come from the mine. Recently, a group of collector/dealers have rehabilitated a shaft accessing the mine and have recovered some large crystals of deep purple, and amber/purple zoned, fuorite. Twins are rare.
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UK OS Grid Reference: NY885364
Map Reference: 54°43'20"N , 2°10'42"W
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