Epidote Group Visible Spectra (350 - 1000 nm)

The common members of the epidote group minerals consist of allanite, clinozoisite, epidote, piemontite. The color of clinozoisite and epidote is due to their Fe3+ content and commonly varies from amber to brown. Piemontite contains Mn3+ and is red. Allanite is colored by iron and radiation damage and possibly by rare earth elements. 


Link to references about the spectra of the epidote group

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revised 3-Jul-2022