Bolus Armenus / Borah Armani (بورہ ارمنی) also known as Bole Armoniac and Armenian Bole, is an earthy clay, usually red, native to Armenia. It is red due to the presence of iron oxide; the clay also contains hydrous silicates of aluminum and possibly magnesium.

Historically, it was used as an astringent, prescribed against diarrhea, dysentery, hemorrhage, etc. Externally, it was used in strengthening plasters, against dislocations of the joints.