Tiffany & Co.’s annual Blue Book publication, which celebrates some of the world’s finest pieces, derives inspiration from the sea for its 2015 collection.

Titled “The Art of the Sea”, Francesca Amfitheatrof, the label’s design director, plays up the multiple facets of the sea – from brilliant hues in varying shades of blue, swirls of diamonds to depict the treacherous waves, and colourful gemstones that highlight a vivid world of colour under the sea.

Here are our favourites.