1. By Geographic Origin
- Indian Agarwood (Aquilaria malaccensis): Known for its deep, earthy aroma and high quality.
- Cambodian Agarwood (Aquilaria crassna): Prized for its sweet, fruity, and spicy scent.
- Vietnamese Agarwood: Renowned for its rich and complex fragrance, considered among the finest.
- Thai Agarwood: Known for its unique resin profile and woody aroma.
- Borneo Agarwood (Kalimantan, Indonesia): Characterized by a balanced, soft, and deep aroma.
- Malaysian Agarwood: Valued for its sweet, balanced fragrance.
- Papua New Guinea Agarwood: Produces lighter resin with a unique scent.
- Kyara: The highest grade of agarwood, mostly found in Japan, characterized by its exquisite and rare scent.
- Super Grade: Contains high resin content with a strong and lasting aroma.
- Grade A, B, and C: Lower grades with varying levels of resin content and scent quality.
- High-Resin Agarwood: Dense and heavy due to a higher concentration of resin, producing a strong fragrance when burned or distilled.
- Low-Resin Agarwood: Lighter and less aromatic, usually considered of lower quality.
- Natural Agarwood: Formed naturally over decades or centuries due to fungal infection in the Aquilaria tree.
- Cultivated Agarwood: Induced artificially by human intervention through inoculation methods.
- Sinking Agarwood: Dense with resin, heavy enough to sink in water, indicating superior quality.
- Sweet: Often associated with Cambodian and Vietnamese agarwood.
- Woody: Common in Indian and Thai agarwood.
- Fruity or Spicy: Unique to certain regions like Borneo.