Berdasarkan piawaian Ibn Khaldun
“The Revelation undertook to mention them and attached many judgments to them, for example zakat, marriage and hudud, etc. Therefore, within the Revelation, they have to have a reality and specific measure for assessment (of zakat, etc) upon which its judgments may be based rather than the non-Shari’i (other) coins. Know that there is a consensus (ijma) since the beginning of Islam and the age of the Companions and the Followers (Tabi’in) that the Dirham of the Shari’ah is that of which then weigh seven mithqals (weight of the Dinar) of gold.”
Ibn Khaldun, Al-Muqaddimah
World Islamic Mint telah menetapkan piawaian Silver Dirham seperti dibawah:
Piawaian Silver DirhamGambar diatas adalah gambar Dirham Kelantan.