A very solid and stout cluster of intergrown spinel-twinned crystals, unusually thick for this locality and reminiscent of the New Mexico material found a few years' back. This specimen features a central spinel twin surrounded by hoppered crystals of other forms, and is naturally clean on one side and naturally dark (coated with a thin layer of tenorite easily enough removed if desired) on the other, making for interesting contrast. Perfect floater! 4.5 x 1.5 x 1 cm