as well as snake-cucumbers, cucumbers, walnuts, eggs, and pomegranates.

Ribā likewise does not apply to manufactured goods that are no longer traded by weight, such as cloth, weapons, copper coins, and vessels made of materials other than gold or silver.

Section

When a commodity that is customarily sold by volume is exchanged for its own kind—dates for dates—or a commodity sold by weight for its own kind—gold for gold¹—the transaction is valid only on two conditions: the amounts must be identical and each party must take possession before they part company.

If the exchange involves different commodities—gold for silver, or wheat for barley—the sale is valid provided that possession is taken before separation; a difference in quantity is then permissible.

Where a volumetric commodity is exchanged for one sold by weight—wheat for gold, for example—both disparity in amount and delay in possession are allowed.

It is invalid to sell a volumetric commodity for its own kind by weight, or a weighted commodity for its own kind by volume. It is, however, permissible to sell meat for an equal amount of meat once the bone has been removed, or meat for a live animal of a different species. Likewise, one may exchange ribā-liable flour for an equal amount of the same flour when both batches are equally fine or coarse; its moist dough for moist dough, its dry form for dry form, its juice for juice, and its cooked product for cooked product, provided the two portions share the same degree of dryness or moisture.

A derivative may not be sold for its origin: oil for olives, sesame oil for sesame seeds, cheese for milk, bread for dough, or zulābiyya (fried dough) for wheat. Nor may hardened grain still in its ear be exchanged for the same grain. Such transactions are, however, valid when the items belong to different categories.