Note the REALLY OLD Smithsonian label, older than any other Smithsonian label I have ever sene out there nad predating their standardized typed labels we see even by the late 1800s! Very old matrix clinoclase from the classic U.S. location for the species. The specimen consists of small vugs containing crystals to about 5mm. The piece comes with two historic labels. The first is from the Smithsonian Museum and is a hand written label. The second is a label from The Thurstons, mineral dealers from the 1940's and 50's.