Three tonnes of crystals hang from stainless steel branches

The thousands of Swarovski crystals sparkle on stainless steel branches, all reflected in a shattered mirror.

The shining tree, called Silent Light, also rotates on a mirrored plinth at the entrance to the museum.

It was crafted by fashion designer Alexander McQueen and light designer Tord Boontje, the museum said.

Swarovski donated the three tonnes of crystals used in the tree, which will be on display from 15 December to 5 January.

A museum spokeswoman said she did not know the cost of the tree, but there was no extra security at the museum while it was on display.

Mr McQueen said the experience was a real challenge, while Tord Boontje said the engineering involved "seemed like something they might have done for the Great Exhibition at Crystal Palace in 1851".

The tree will be returned to Swarovski after 5 January.