This is an incredible, important, matrix copper-calcite specimen from the late 1800s. It is classic material, but seldom do we see such aesthetically fine, and matrix, specimens! The crystals are lustrous, gemmy, and pristine! The cluster measures 3.5 inches across, with crystals to 2 inches (and doubly-terminated). The matrix is a heavy mix of copper wires infusing and penetrating a basalt, and in fact the basalt is probably held together by the rich network of the copper. According to Ed, he owned this copper some 15 years ago, sold it, and it went to Larry Conklin for his own personal collection, from whom Ed bought it back in due time. It was formerly in the collection of Robert Hesse and ROBERT B. GAGE, dating it back to the heyday of Michigan mining (sadly, though, no labels have survived with the specimen from the Gage era, although the history is noted on the Conklin label). Robert B. Gage (1875-1946) of Trenton, New Jersey, worked as a chemist for the New Jersey State Highway Commission and was a key individual in the collecting and identification of minerals, particularly from Franklin, New Jersey. The mineral Gageite was named after him. Gage frequently corresponded with Washington Roebling, Frederick Canfield and other important collectors in the early part of the 20th century. Gage supplied these collectors with minerals from Franklin, New Jersey. 18.8 x 13.4 x 6.9 cm