Mineralpedia Details for Agardite-(La)
Named as an analogue of agardite-Y which in turn was named in honor of Jules Agard, a geologist with the Bureau de Recherches Geologiques et Minieres in Orleans, France, and for the dominance of lanthanum over the other rare earth elements. Agardite-La is a rare mineral that can be found in small amounts in oxidized hydrothermal polymetallic mineral deposits in localities in the United States, Greece, England, Germany, and Italy, among only a few others.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/agardite-(La).pdf
Agardite - (La) from Hilarion mine, Laurium dist., Attika, Greece
Greenish blue radial sprays of fine acicular crystals to 0.75mm.