We like nothing better than to be invited to something destined to brighten up winter days. So, when Tiffany & Co told us that the famed Tiffany Diamond was currently on show at their flagship Fifth Avenue New York store, we skipped off to see it, posthaste.

It's a little-known fact that the brand that brought us such sculptural pieces as Elsa Peretti's bone cuff and Paloma Picasso's Graffiti bracelets also has an esteemed history of sourcing some of the finest coloured stones ever found.

The Tiffany Diamond, a stonking raw yellow gem of over 287 carats was discovered in Africa in 1877 and promptly acquired by Charles Lewis Tiffany, who maximised its brilliance by having it cut to a single diamond of 128.54 carats. Since then it has been constantly on the move, whether at world fairs or in museums but home - the Fifth Avenue Tiffany & Co store - is where it always comes back to.

As an added treat, the Tiffany Salon has a few of the brand's other fancy diamond pieces on show, on an appointment basis, including a pave ring with a 6.07 carat fancy pink diamond and another with a whopping 15-carat fancy vivid yellow.

The Salon, a fairly recent addition to the Fifth Avenue flagship, is worth the detour alone. Robert A.M. Stern Architects, designers of the 1920s-inspired 15 Central Park West building, created the space. As such it reflects all the glamour and grandeur of apartments of the New York Art Deco era that Tiffany & Co is an intrinsic part of. From the smoked-oak and shagreen desk to the satinwood chairs and soft blue, grey and silvery palette, it also doubles up as a suitably sumptuous viewing space.

So if you happen to be in New York over the next couple of weeks, it's well worth dropping in. Add to this the fact that some of these diamonds on show are of a particularly sizeable nature and you get the point as to why Tiffany & Co is so keen to show them off.