Persian blue: made by grinding up the mineral Lapis lazuli. The most important mineral component of lapis lazuli is lazurite (25% to 40%), a feldspathoid silicate mineral with the formula (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1–2.
Clay earth pigments (naturally formed iron oxides)
Raw Umber (PBr7): a natural clay pigment consisting of iron oxide, manganese oxide and aluminum oxide: Fe2O3 + MnO2 + nH2O + Si + AlO3. When calcined (heated) it is referred to as Burnt Umber and has more intense colors.
Raw Sienna (PBr7): a naturally occurring yellow-brown pigment from limonite clay. Used in art since prehistoric times.
A number of pigments, especially traditional ones, contain heavy metals such as lead, mercury, and cadmium that are highly toxic. The usage of these pigments is now highly restricted in many countries.
^Smith, Andrew E.; Mizoguchi, Hiroshi; Delaney, Kris; Spaldin, Nicola A.; Sleight, Arthur W.; Subramanian, M. A. (2009). "Mn3+ in Trigonal Bipyramidal Coordination: A New Blue Chromophore". J. Am. Chem. Soc. 131: 17084–17086. doi:10.1021/ja9080666.