Ultramarine (PB29): a synthetic or naturally occurring sulfur containing silicate mineral - Na 8–10Al 6Si 6O 24S 2–4 (generalized formula)
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(AlSiO 4) 6(S,SO 4,Cl) 1–2.
Zinc yellow (PY36): zinc chromate (ZnCrO4), a highly toxic substance with anti-corrosive properties which was historically most often used to paint over metals.
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 + SiO2 + Al2O3. 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 use of these pigments is now highly restricted in many countries.[1]
^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 (47): 17084–17086. doi:10.1021/ja9080666. PMID19899792.