- Toenail, 2.8 x 2.3 x 2.0 cm
- United St. Day Mines, Cornwall, England
- Ex. Willard Perkin; John and Linda Stimson
BRILIANT ELECTRIC BLUE acicular crystals of clinoclase, forming rosettes and ballshaped aggregates, on a bit of matrix.This is a beautiful thumbnail with unusually intense color. It was most likely found in the early to mid 1800s when this region was productive of specimens. Formerly in the collection and with label of Willard Perkins, the collector who invented the so-called "Perky Box" for thumbnails.