Five of the largest pink diamonds in the Argyle Diamonds Collection Highlights | Updated 4 years ago Pink Diamonds Image copyright of WA Museum Five of the largest pink diamonds in the Argyle Diamonds display collection held at the Western Australian Museum. The largest (centre in the above picture) weighs 0.58 carats. Through the generosity of Argyle Diamonds, an important part of Australia's rich mineral heritage is preserved in an Australian public institution for the benefit of future generations. In a gift to the nation, in 2003 Argyle Diamonds donated several hundred pink diamonds to the mineralogical collection of the Western Australian Museum. This donation comprises twenty-eight parcels of faceted pink and other coloured stones from the Argyle (AK1) Mine in the Kimberley of Western Australia. The collection represents the largest of its kind in any public museum in Australia. Mineral Collection View the discussion thread.