The concept of an "unadulterated substance" can be subjective and dependent on the context in which it is used. In a general sense, an unadulterated substance refers to a substance that is pure, without any impurities, additives, or alterations. However, it is difficult to identify a single substance that can be considered universally unadulterated in the entire world, as most substances can be subject to some form of processing, modification, or contamination.
In terms of natural resources, elements such as gold, silver, and other precious metals can be considered relatively unadulterated in their pure form when they are mined and extracted from the Earth. Similarly, certain minerals and gemstones may be considered unadulterated when they are in their natural state.
In the realm of chemistry, high-quality laboratory reagents and substances produced through rigorous purification processes can be considered unadulterated to a large extent. These substances are often used as reference materials or for analytical purposes.
It's important to note that even substances regarded as unadulterated in one context may become adulterated or contaminated when subjected to various human activities or industrial processes.