Silver London blue topaz and black diamond Amulet ring from the Anna Sheffield collection. Anna Sheffield's inimitable style is beautifully illustrated in this impeccably thought-out ring. Easy to wear, the classic shape will slot into your existing collection with ease, while the bold shade adds a stunning hit of colour and clarity. Features: Inverted London blue topaz with black diamond surround. Composition: Sterling silver, London blue topaz, Black diamond. Dimensions: Band: 0.1cm. Detail: 1.2cm x 0.8cm.