Merlin diamond mine

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The Merlin diamond mine is one of only two diamond mines in Australia. The mine is located in the Northern Territory of Australia, about 80 kilometres south of Borroloola. The mine operated for a period of about four years from 2000 to mid-2003, during which time it produced about 500,000 carats (100 kg) of high quality diamonds.

The Merlin mine has an unusually high proportion of gem-quality diamonds: 65% of production is gem-quality, and only 35% is classified as near-gem or industrial quality. This compares to a worldwide average of just 20% gem-quality diamond production at diamond mines worldwide, and a mere 5% gem-quality production at Australia's only other diamond mine, Argyle diamond mine. The high ratio of gem-quality diamonds is responsible for a relatively high value of $108 USD per carat (540 $/g). The known ore grade at Merlin is about 0.2 carats (40 mg) per tonne, although exploration continues under the mine's new owner. The largest diamond produced at the Merlin mine measured 104.73 carats (20.946 g), the largest ever found in Australia, and has been valued at over $500,000 USD.

The mine and mining rights were sold by Rio Tinto Group, which initially developed and operated the mine, to Striker Resources, which has recently explored the possibility of reopening it [1]. The mine is now owned by North Australian diamonds and has been producing since May 2006.