Black boswellia sacra is one of the last gum from the tree..
An incense resin from benzoin that is very old.
Copal is a semi-fossil resin that is close to amber.
The black djaoui is an incense resin extracted from a tree also called Benjoin, it is used to give a good odor of incense.
This product also comes from Hojari Grade like the blue ...
Red djaoui is an incense resin made from benzoin, also known as styrax.