Is a sale contract valid if the price is stated in a mixture of gold and silver without specifying the amount of each?

Chapter on Selling the Musarrah (Animal with milk retained in udder)

Al-Mughni

Book of Sales

Book 12 · Issue 3 · Bab 5

Open in Qurani

Primary text

A sale specifying the price as 'one hundred in gold and silver' is invalid. This is the position of al-Shāfiʻī.

Supporting text

Abu Ḥanīfah deems this valid, requiring the price to be split equally (half gold, half silver) based on the implication of equality in an unspecified quantity.