Patent is a form of intellectual Property that is granted by the national patent office across the jurisdiction. Every National patent office has their own law related to granting the patent for a product or process which solved a existing problem/ encounter by the humankind, which vary from jurisdiction to jurisdiction.
As per the INDIAN PATENT ACT 1970, SECTION 3; describes what are not inventions. I wanted to bring your kind attention towards Section 3 (c) & Section 3(d) of the Indian Patent Act, 1970.
Section 3(c): the mere discovery of a scientific principle or the formulation of an abstract theory or discovery of any living thing or non-living substance occurring in nature;
Section 3(d): the mere discovery of a new form of a known substance which does not result in the enhancement of the known efficacy of that substance or the mere discovery of any new property or new use for a known substance or of the mere use of a known process, machine or apparatus unless such known process results in a new product or employs at least one new reactant.
So the mere discovery of new Substances which are already existing in nature are not patentable. The specific kind of wood discovered are already present in the nature and it does not involved any human kind intervention in term of technology. but the design of chair made from that wood qualified for the protection under IP for its ornamental design hence protected under Industrial design.