Witherite replaced with Baryte

Liverick Vein, Nentsberry Haggs Mine, Alston Moor District, Cumbria, England A fine miniature composed of the upper halves of two pseudo-hexagonal Witherite prisms from the Liverick Vein at Nentsberry Haggs mine on Alston Moor, Cumbria, England. Witherite is a reasonably rare barium carbonate and here forms opaque chalky white crystals with flat pinacoid terminations and a very fine-grained sucrosic texture. Although such white crystals are often labelled as just Witherite, the white coating or crust is actually Baryte or Barytocalcite and in this example has pseudomorphed much of the Witherite. It is accompanied by a Patricia Greenbank Collection label (PG534).