These exquisite Chino coppers were found just in one small area of the pit, in a lucky find of a single elongated vein. Although several hundreds of smaller crystals were recovered (in approx 2006), only a relative handful of perfect, doubly-terminated coppers of this size magnitude were found. This piece is particularly sharp, and shows the characteristic twinning flanges flaring off around the side of the main axis, which itself is an elongated spinel-twinned copper crystal