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Vintage Blue Topaz Ring 3.50 Ct Sky Blue Topaz and Emerald Green Chrome Diopside Ring Genuine Natural Gemstone 925 Sterling Silver Size 6

Vintage Blue Topaz Ring Ct Sky Blue Topaz and Emerald Green Chrome Diopside Ring Genuine Natural Gemstone 925 Sterling Silver Size 6

The Blue Moon is the world’s most expensive blue diamond

Sotheby's flawless Blue Moon diamond, a 12.03ct will be the largest ever blue diamond ever to appear at auction. It was cut from a 29.62 rough blue, found by Petra Diamonds at the South African Cullinan mine in Jan 2014. It was purchased by Cora International and took 6 months to cut and polish. Estimates for auction will be between $35 and $55 million.

All in One - 'The Perfect Blue', 'The Ocean Dream' and 'The Rajah' at Christie's

The Perfect Blue Diamond - a 13.22 carat Flawless Vivid Blue Diamond auctioned by Christie's and estimated at over $21 Million

Art Deco 1930s brooch has a large 35.10ct briolette cut aquamarine,light sky blue in colour and set in 18kt. The twenty-four single cut and four baguette cut diamonds, and fourteen calibre cut synthetic sapphires, set off the colour and cut of the aquamarine.

20 Gorgeous Aquamarines

Created by the Asprey craftsmen, the Daisy Heritage Bracelet has been individually set with marquise cut aquamarine petals and a pavé diamond centre, set in 18ct white gold.

AQUAMARINE AND DIAMOND DRESS RING. Centring on an oval aquamarine stated to weigh 20.08 carats, encased within a border of brilliant-cut diamonds, to similarly set split shoulders, size K, British hallmarks for London, 2007.

The colour of summer: Annoushka presents new Dusty Diamond jewellery in hot hues

Annoushka Dusty Diamonds rose gold ring with blue diamonds and a London blue topaz.

A perfect 4CT Cushion Cut Halo Russian Lab Diamond Engagement Ring

This stunning design is features a carat round brilliant cut diamond. The center stone, and two side stones are set in interwoven, trellis patterned prong settings. The graceful curves of the setting, and the reverse tapered band create an elegant ring.

5.4 ct sapphire and diamonds platinum ring.

Blue Sapphire Engagement Ring 14k Rose Gold 3.84ct, Pear Cut sky blue Sapphire Ring. Engagement ring by Eidelprecious

Engagement ring by Eidelprecious. Rose gold engagement ring with Sky Blue sapphire.This is a gorgeous ring. It features a beautiful very light blue