Almoravids. Ali ibn Yusuf and el amir Sir. Habba or 1/16 quirat. (FBM. Cd9, same example). This small coin/weight with the name of Ali and Sir can obviously be dated between AH 522 and 533. These few weights are almost all the material metrological evidence that we have of the habbas of the Almoravid period. Vives' numismatic quirat, the real coin, was arbitrarily defined by him with a theoretical weight of 1 g. and it is his definition that we use numismatically. However, in classical Islamic metrology, the quirat is equivalent to 3 habbas (closer to Vives' 1/8 quirat). Undoubtedly the best known example. Extremely rare. 0,05 g. MBC.
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