Botallackite - 
Cligga Head, St. Agnes, Cornwall, Great Britain
 
Long tabular bluish-green crystals and pearly crystal groups (up to 6 mm) on copper-mineralized beach conglomerate. Good and typical Botallackite specimen from the find in April 2007, which yielded the world's richest specimens and largest crystals of this classical copper halide (cf. LAPIS 9/2007). Ex Stefan Weiß collection