Blue Moon Ring Stack in 18 carat gold vermeil on sterling silver by Astley Clarke Colour. Designed by our creative design team this ring stack consists of four rings from the Astley Clarke Colour collection: Moonlight Enamel Ring. Timbrel Moonstone Ring. Duck Egg Blue Enamel Ring. Vintage Blue Enamel Ring. Whilst we encourage you to create your own ring stack, there is no denying that this combination combines contrasting subtle blue and white hues to great effect. Designed to fit seamlessly together, mix and match sumptuous gemstones with your favourite hand-mixed enamel rings and add a little vibrancy to your jewellery box.