MYTH BUSTED! Fraser Island is the world's largest sand island but it most definitely doesn't have more sand than the Sahara desert.
The island's sandscapes sculptured over time by wind and tides. The oldest sand - which is white in colour and leached of minerals - is found on the western side of the island.
Sandblows, like Stonetool Sandblow, along the eastern coast of the island are mobile and sweep across the island, often burying forests and other plant communities until they reach a place that is protected from winds and the movement stops.
The rate of movement of the dunes each year depends on factors such as wind strength, the amount of moisture in the sand and plant colonisation and it's estimated that a grain of sand can take 60,000 years to pass from one side to the other.
The young dunes behind the eastern beaches become colonised when stabilises such spinifex grass and other coastal plants take root.
In the sheltered central regions of the island, where the dunes are stable and there are more nutrients for growth, diverse plant communities and rainforests are found.
Fraser Island and Rainbow Beach are also know for their coloured sands. On Fraser these can occur north of Eli Creek and are made up of 72 different colours, mostly reds and yellows. The colours are caused by the leaching of oxides that coat each grain of sand, causing bands of colour.