Liroconite crystals to 6 mm on limonite matrix, Wheal Gorland, St. Day, Cornwall. Published specimen.
ex Ian Acworth, ex Richard Barstow (1947-1982 - http://www.minrec.org/labels.asp?colid=103). Barstow sold this specimen to Acworth in 1978. Liroconites were largely mined from the late 18th to mid 19th century.
Published in Lapis 7-8/2020 pg 25.