Rio Tinto's rare red diamonds on display
Diamonds don't just come in all shapes and sizes: they come in a rainbow of colours, from cherry blossom pinks and the deepest ruby reds to deep ocean blues and icy whites.
Rio Tinto had 64 of them on show from its Argyle Diamond Mine as part of its annual tender process.
For the first time in the mine's 30-year history, the tender includes three extremely rare red diamonds.
The 2013 collection also includes 58 pink and three blue diamondsMore details at DiamondWorld.