Rare Earth Elements Or. The rare earth elements are all metals, and the group is often referred to as the \\rare earth metals.\\ these metals have many similar properties, and that often causes them to be found together in geologic deposits. Other substances can be substituted for rare earth elements in their most important uses;
It was inexpensive and very effective.
2) seek alternative materials to use in place of rare earth elements; In 2010 china significantly restricted their rare earth exports. The recent price increases have almost eliminated the use of cerium oxide in rock tumbling and the lapidary arts. In 2012 and 2013 they were supplying about 2% to 3% of world production.
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