Figure 1. Measuring 7.59 mm in largest dimension and weighing 1.84 ct, this partially etched diamond octahedron contains a bright green inclusion of chromium diopside. Photo by Robison McMurtry.
Figure 2. Rich green transparent crystals of chromium diopside are very uncommon inclusions in diamond. The example shown here has a typical rounded, etched habit. Photomicrograph by Nathan Renfro; field of view 1.80 mm.