The mineral deposits that are hidden in the earth and their excavation requires much labour such as gold, silver, oil, gas, etc.
Al-rabi'
Mudarabah al-muqayyadah (restricted mudarabah)
’ard al-waqf
Bai‘ al-kali bil kali
Al-nawa’ib
Al-khalit
Muwakkil
Israf
Suftajah
Al-mil