Contrary to what the name implies, “Rare Earth” metals aren’t rare in quantity, just notoriously hard to separate from the surrounding rock. In fact, many are relatively abundant in the Earth’s crust.
You can watch a notably nervous researcher explain more below:
Because of their geochemical properties, rare earth elements are typically dispersed and not often found in concentrated and economically exploitable forms. This difficulty in location and separation determines their rarity, not their abundance.
Learn more here.