This magnificent Cartier bracelet, exhibited at Masterpiece London 2015, stand B3, by Siegelson, boasts the symmetry and bold colour that defined the Art Deco period. The bracelet, in tapered black lacquer, is set with diamonds and emeralds and has natural pearls at either end of the open closure.

Art Deco emerald, sapphire and diamond pendant necklace by Cartier, Paris, 1925. Siegelson  at Masterpiece London 2015, stand B3.

Cartier's 1928 Art Deco Turtle clock, exhibited by Siegelson at Masterpiece London 2015, stand B3, features a clock face edged in gold with diamond-set hands in the form of a dragon, hidden inside a turtle’s shell decorated with black and turquoise enamel and ruby cabochons.

Cartier's Cole Porter Egyptian suite, which Siegelson exhibits at Masterpiece London 2015, stand B3, features a 1926 Scarab belt buckle brooch and a 1928 Eye of Horus bracelet with diamonds and cabochon sapphires.

Theodore B Starr's 1920s acrostic stacking rings featuring either a square-cut diamond, a cabochon emerald, a cabochon amethyst or a cushion-cut ruby, exhibited by Siegelson at Masterpiece London 2015, stand B3.

Siegelson is also exhibiting this Van Cleef & Arpels diamond, emerald and pearl brooch dating from 1926 at Masterpiece London 2015, stand B3.

The Mauboussin diamond cuff bracelet and removable clip brooches exhibited by Siegelson at Masterpiece London 2015, stand B3.

Suzanne Belperron and Jeanne Boivin Art Modern gold and ivory Tranche cuff, created for the house of René Boivin in 1931, to be exhibited by Siegelson at Masterpiece London 2015, stand B3.

Siegelson ruby, sapphire, yellow diamond and enamel heart brooch by Paul Flato, New York, circa 1938. at Masterpiece London 2015, stand B3.

Siegelson in collaboration with London-based jeweller Lauren Adriana at  at Masterpiece London 2015, stand B3, which includes pair of spinel (35.80 and 37.62ct) and diamond earrings featuring a strand of natural pearls wrapped around the stone, suspended by diamond-set blackened silver.

Another jewel from the recent collaboration with Siegelson and Lauren Adriana at  at Masterpiece London 2015, stand B3, includes a rare type IIb deep blue diamond (the same certified colour as the Hope diamond) and is surrounded by coloured pave diamonds with each stone hand-selected to bring out the unusual.

Artistic pink bakelite, ruby, and diamond jellybean suite of bracelet and earrings by Daniel Brush, New York, 1991 (on loan from Siegelson at Masterpiece London 2015, stand B3).

Siegelson, 589 5th Avenue, Suite 1501, New York, NY 10017 , United States. T  212-832-2666 - F  212-832-2882 - E-mail siegelson@siegelson.com - Website http://www.siegelson.com