Vintage 1950's Kigu Marcasite EarringsVintage 1950's marcasite earrings by jewellery designer Kigu of London. Kigu manufactured these marcasite earrings in the shape of elaborate bows. Marcasite is actually Pyrite all known as Fools Gold. It was used in jewellery due to it's ability to catch the light, giving a diamond effect. Kigu of London manufactured high quality compacts for the famous and a small selection of jewellery. MEASUREMENTS The earrings measure 3cm 1. 2" in height and 2.