Examples of natural substances are gypsum, lime, common salt, oil, nature india rubber, natural coloring materials such as Indigo or magenta, Terpene, fats, Resins, waxes, oils, in addition, horn or ivory. Also natural stones such as granite or marble are called occasionally natural substances.
The term natural substance sets off linguistically and contentwise from the plastic , thus from such materials, which do not occur in nature, but manufactured are synthetic. Artificially manufactured materials, which copy natural substances, are called “nature identically “.
Web on the left of
-  overview of the most important natural substance classes