Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Barite specimens in the National Museum of Wales collection, previously part of the Cymmer Welfare Library and Institute Collection, are labelled Llantrisant. Specimens probably originated from one of the many disused iron mines in the area and are simila
Rhiwsaeson, Llantrisant, Rhondda Cynon Taf, Wales, UK