GREEN OCTAHEDRAL DIAMOND CRYSTAL. ...

Description

GREEN OCTAHEDRAL DIAMOND CRYSTAL
Sierra Leone
Of all the fancy diamond crystal colors, green is the second most rare (after red). This beautiful example is accompanied by G.I.A. report 1106199921 which describes it as a transparent yellowish green rough crystal of natural color, weighing 0.61 ct. Because diamonds are the only gemstones composed of a single element (carbon) and because their crystal lattice is so strong, only three atoms, nitrogen, hydrogen and boron, are small enough to work their way into the tetrahedral crystal arrangement. Nitrogen will cause a yellow or brown coloration, whilst the green hue can be caused by atomic or gamma radiation. This exquisite natural gem crystal measures 4.1 x 3.74 x 5.06 mm.

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