“An unusually large and beautiful specimen with faint amethysts on one side and rock crystals ones on the other (2nd picture) from a Swedish classic. Formerly in the collection of Wilhelm Anderberg (1827-71), the first well-known mineral dealer in Sweden, size 90 x 200 x 200 (mm). A. Österlöf photo School of Mines collection Luleå University of Technology Sweden ”

“Other side showing the "rockies".”