The corona of cubic zirconia gemstones on these 9 carat Yellow Gold Cubic Zirconia Halo Stud Earrings add a tangible sense of luxury and class, while the fiery central stone naturally catches the light in the most attractive way, making these earrings ideal for a variety of occasions. Formal enough for work, and pretty enough to want to wear everyday, these earrings are timelessly chic. Cubic zirconia is the manmade equivalent of a diamond, with none of the ‘inclusions’, or flaws, which occur in natural gemstones: cubic zirconia is created to be flawless, and to have even more ‘fire’ than a diamond. Heavier than a diamond, although not quite as hard, cubic zirconia also has a fascinating history: developed by Soviet scientists in Moscow during the Cold War, the gemstone has gone on to be mass-produced all over the world, and is an affordable equivalent to a diamond in precious jewellery.