Shop › Enamelled Circle Earrings by Mia Houghton Image 1 of 3 Image 2 of 3 Image 3 of 3 Enamelled Circle Earrings by Mia Houghton £45.00 Vitreous enamel on sterling silver with sterling silver ear wires. Color: Green Blue & Turquoise Turquoise Add To Cart Added! Vitreous enamel on sterling silver with sterling silver ear wires.