Moissanite necklaces in solid 14k gold and platinum. Moissanite is a lab-grown stone (silicon carbide), a Mohs 9.25, that throws even more fire than a diamond, making it a bright, brilliant diamond alternative at a small fraction of the price. The collection runs from an everyday pendant and a solitaire necklace to oval, round and dainty diamond-halo pendants set with natural diamonds, and a 7 mm statement. Moissanite is not a diamond; it is its own stone, and every piece is made to order and ships fully insured.