Many notes and materials can contribute to an earthy feel in a fragrance. These include roots such as vetiver and iris, soil notes from geosmin and mitti attar, woody notes like oakmoss and patchouli. Other synthetics such as cashmeran and ozonic/mineral/fungal smelling compounds are also used.
Earthy fragrances will typically have a green or woody character, although earthy notes can be used to give contrast to lighter, fresher fragrances.
Many of the examples in this category can be very evocative, complex, and interesting fragrances, and some will be challenging or unusual.