Platinum over Sterling Silver VG Moissanite 5mm Round Solitaire Pendant Necklace, 18" Moissanite in its natural form is too rare and too small making it unsuitable for jewelry purposes. However, one century after it's discovery, through a combination of science, technology, and master gemcutting, created Moissanite is available for fine jewelry. Moissanite has 2.5 times the fire of a diamond Moissanite's hardness is 9.25 on the Mohs scale, second on to a diamond - But it is tougher than a diamond, making it less likely to chip or break. Each piece of Moissanite is hand-faceted by a master gem cutter to maximize it's brilliance and fire. Moissanite is actually more difficult to cut than a diamond. Diamond Equivalent Weight: 1/2 cttw Imported