Astley Clarke Colour 'Colour Theory' enamel hoop earrings in 18 karat yellow gold vermeil, available exclusively from Astley Clarke. Designed by our creative design team, the London Nights black enamel hoop earrings feature a black enamel inlay. The designer earrings measure 1.75mm in width and have an inner diameter of 47mm. As girls we know that one is never enough, so each piece in the collection enables you to layer colour and gemstones to suit your mood. We challenge you to add a little Astley Clarke Colour to your jewelry box and not notice the difference... a word of warning though, the combinations are limitless and the more you have the more desirable they become.