Earth earths aren't that rare, they are just low concentration generally.
Australia does a huge amount of mining, and as part of that mining we are getting better at extracting other minerals out from the tailings. Olympic Mine is a great example. Its a copper mine, and earns 70% of its total from Copper. But it is also the second largest uranium mine in the world, with 25% of its earnings from uranium. They also extract copper and gold from it. Because it can operate even when the uranium price is low, it put the largest Uranium mine, out of business (McArthur River in Canada). Given you are already mining, and processing, extracting the additional minerals is much more cost effective than often even mining rich reserves of those specific elements.
There’s about 10 million contained tonnes of rare earths lying in just one mine in Australia – but whether they will ever […]
www.mining.com
Olympic dam has one of the largest reserves of rare earths in the world, and its already mined. The only reason they haven't extracted them, is spending money extracting them would be more profitable extracting more copper, uranium, silver or gold.
Australia does also have the richest specific deposit,
Mount Weld which is what Lynas is mining. Browns range is another specific site high in certain types.
But Australia doesn't do much onsite refining and processing in general. We do bulk extraction and ship it. Given the areas are often very dry or lack other resources need to process (coal etc) they have to be shipped anyway.
Propellers are tricky business. Its not unheard of that a new (or modified) ship has issues with propellers. The classic example that comes to mind it Charles De Gaulle. It had vibration problems, and then later the propeller blades snapped off. They temporarily fitted the old prop from Foch.
A jinxed ship shouldn't go to the Bermuda Triangle
www.irishtimes.com
www.wsj.com
Obviously if your building ships, building key parts that make them work is important. Not just for Australia. For the region. For our allies.