TV66Z9: Dendritic growth of Copper crystals with a rounded shape but with some smooth and very well defined faces. The aggregate is on a very unusual matrix with translucent white rhombohedral Calcite crystals. The sample is with a Steven C. Chamberlain collection label that we will send to the buyer.
Houghton County, Michigan  USA

Specimen size: 7.5 × 4.6 × 3.6 cm = 2.95” × 1.81” × 1.42”

Main crystal size: 0.9 × 0.7 cm = 0.35” × 0.28”