Veronese earth

Terre verte or Veronese earth is a magnesium clay coloured by ferrous silicate. It is very rich in silica and poor in alumina and usually contains, besides magnesia, also small quantities of alkali, and sometimes lime and carbonic acid. 

Veroneser-erde, /. Verona earth, -gelb, n. Verona yellow, -griin, n. Verona green (Verona earth). 

Other sources also indicate that Veronese green could be used to mean green earth q.v.-, Toch, 1925 Wehlte, 1975 Grissom, 1986) though it may be that there was a confusion in this context between Verona and Veronese (that is, from Verona ), that city being the location of a famous source of green earth ( Verona earth,. v.). 

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