The best answer that identifies a product made from natural capital is forests.
Natural capital refers to the world's stocks of natural assets, including geology, soil, air, water, and all living things. Forests are considered a part of this natural capital as they provide resources and ecosystem services such as timber, biodiversity, and carbon storage.
While coal, jet fuel, and crude oil are derived from natural resources, they are processed products (fossil fuels) rather than direct representations of natural capital itself.