Moissanite

Moissanite is a man made stone that has just as much fire and brilliance as a diamond, it scores 9.25 on the Mohs Scale of Hardness. That makes it the hardest gemstone used in jewelry next to diamonds (which is a 10). Moissanite has an even higher refractive index than diamonds, so it's even sparklier than a diamond giving off rays of vibrant fire.