Wolf, Ron2025-02-242025-02-24https://hdl.handle.net/11124/179510Photographed by Ron Wolf.Glassy purple fluorite crystals and grey-white calcite.born digitaldigital photographsCopyright Ron Wolf.In copyright - non-commercial use permitted: http://rightsstatements.org/vocab/InC-NC/1.0/mineral and rock specimensfluoriteMinerals -- England -- Durham (County)Calcite -- England -- Durham (County)CrystalsImage