A LARGE PLATE OF ENGLISH FLUORITE
COUNTY DURHAM
of natural form, the green crystals showing fluorescence to deep purple in sunlight from the Rogerley Mine, Weardale
16in. (41cm.) wide
A LARGE PLATE OF ENGLISH FLUORITE
COUNTY DURHAM
of natural form, the green crystals showing fluorescence to deep purple in sunlight from the Rogerley Mine, Weardale
16in. (41cm.) wide