Rare earths miner Lynas Corp of Australia is assessing its options for an initial processing plant, as it looks to soothe concerns in Malaysia about radioactive waste.Lynas produces a rare earth concentrate that it currently trucks 35km, then rails more than 800km to the coast, where it is shipped to Malaysia to be separated into elements such as Neodymium and Praseodymium, used in industrial magnets.The so-called cracking and leaching plant is one of two conditions Malaysia placed on the company when it recently renewed its license, which will be reviewed again in six months.It will be built as part of a US$500 million growth strategy to boost production by 2025.