Sentence Examples


  • ULTRAMARINE, a blue pigment, consisting essentially of a double silicate of aluminium and sodium with some sulphides or sulphates, and occurring in nature as a proximate component of lapis lazuli.
  • As early at least as the ith century the art of extracting a blue pigment from lapis lazuli was practised, and from the beginning of the 16th century this pigment began to be imported into Europe from "over the sea," as azurrum ultramarinum.
  • The composition of the pigment is quite similar to that of lapis lazuli; but the constitution of both is uncertain.
  • The mineral was probably included with selenite under Pliny's term lapis specularis.
  • The lapis specularis of Pliny, scattered over the Circus Maximus to produce a shining whiteness, was probably mica.
 

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