These native copper crystal spinel twins are from the Chino Mine in Santa Rita, Grant County, New Mexico, USA. They are from the 2006 find by Stan Esbenshade. He found a boulder that had some partially exposed crystals and then carefully leached and trimmed hundreds of copper specimens from it. The most famous pieces were coppers with spinel twinned habits. These are large, well defined and aesthetic. This piece is a complex crystal cluster or combination of crystals consisting of, mostly spinel twinned crystals. There are secondary, formations of elongated, hoppered crystals and smaller spinel twins. This piece measures 1 1/2 x 3/4 x 1/2 inches or 38 x 19 x 13 mm.