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Please note that work experience in English is not sufficient for a TOEFL/IELTS waiver; the key factor is being educated in English.
The TOEFL and/or IELTS test date must be no earlier than two years before the application submission date to be valid, and not later than the deadline date for the round in which you are applying.
TOEFL and IELTS Considerations:
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The principal sources of rare-earth elements are the minerals bastnäsite , monazite , and loparite and the lateritic ion-adsorption clays . Despite their high relative abundance, rare-earth minerals are more difficult to mine and extract than equivalent sources of transition metals (due in part to their similar chemical properties), making the rare-earth elements relatively expensive. Their industrial use was very limited until efficient separation techniques were developed, such as ion exchange , fractional crystallization and liquid–liquid extraction during the late 1950s and early 1960s.