IMN_ WORLD ISLAMIC STANDARD is already made a 
documentation of Research, Historical Writing, Fiqh and Measurement for 
Dinar Dirham Islam concerning weight and purities, and followed by FATWA
 CONCERNING STANDARD WEIGHT AND PURITIES OF DINAR DIRHAM ISLAM (Januari,
 2011). We found this  writing from Dr. Ahamed Kameel regarding The 
Historical Standard, Islamic Gold Dinar will put more and more the Dinar
 24K (9999) in strong position to implement in our muamalah and the 
pillar of zakat (mal). 
Sources: Dr. Ahamed Kameel, Associate Professor in the Faculty of 
Economics and Management Sciences, International Islamic University 
Malaysia.
Abstract
Lately, there have been questions on what the standards for gold dinar 
and silver dirham are. Since the dinar and dirham indeed formed the 
Shari’ah monetary standards from the time of the Prophet pbuh, our work 
can, therefore, only involve in the rediscovery of that classical 
standard. Henceforth no parties or organizations can come up with their 
own standards. Since the Islamic gold dinar did not come into existence 
until after about 50 years of the Prophet’s pbuh demise, it is obvious 
from history that the solidus of the Eastern Roman Byzantine Empire was 
the monetary basis for the Shari’ah. Hence the best way to determine the
 standard is to look at the definition given by its issuer, the 
Byzantine Empire. Coins unearthed by archeologist cannot be relied upon 
for this purpose because such coins generally suffer from wear and 
possible tempering like clipping etc. It was found that the actual 
historical standard for the dinar to be 4.5gm of pure gold and the 
dirham to be 3.15gm of pure silver. However, since the role of dinar is 
simply as a measure of value that depends on the gold-content and if 
zakat is based upon 1-year’s provision of foodstuff, then the 4.25gm 
dinar of pure gold and 2.975gm dirham of pure silver, as those 
circulated during the Prophet’s pbuh era, is also a standard.
Introduction
Undoubtedly, the interest in gold dinar among the public, academics, 
business community and even governments has increased lately. The 
turmoil in the US and Europe and the ongoing global economic and 
monetary crisis has added to this interest. Capitalism based on 
interest-based fiat monetary system is indeed collapsing and the world 
is on the lookout for possible solutions to the crisis. Returning back 
to gold as the international monetary standard has been one suggestion 
from some quarters. In the case of Islamic economics, the call is to go 
back to the Islamic gold dinar that was the monetary standard of 
Shari’ah throughout Islamic history till the fall of the Ottoman 
Caliphate in 1924. The gold dinar is generally agreed upon as a 4.25gm 
gold coin, based upon the Roman solidus that circulated during the times
 of the Prophet pbuh. The gold dinar forms the monetary standard for the
 Shari’ah rulings on muamalat, zakat, hudud and mahr. Nonetheless, there
 is difference is opinion among the proponents of the gold dinar on the 
purity and weight of the coin – should it be made of 22K gold or 24K 
fine gold? Should it be 4.25gm or more than that?. Twenty four karat 
(24K) gold is fine gold, by today’s standard it is 99.99 percent pure. 
The 22K accordingly contains 91.66% gold, hence known as 916 gold. Due 
to the rounding, some gold dealers make it to be 917, which means that 
in one thousand parts, 917 parts is gold while the rest is some other 
metals, normally silver or copper.
The question whether the gold dinar is of fine gold or not is 
important because it is the Shari’ah standard and even the zakat, the 
fifth pillar of Islam, is based on it. The nisab for money is 20 dinars.
 One who had twenty dinar in one’s possession for one year will have to 
pay a 2½ % zakat on it, i.e. half-dinar. The objective of this paper is 
to determine using historical facts the standards for the dinar and 
dirham.
The Purity of the Islamic Gold Dinar: 22K or 24K?
This question should not be difficult to answer because the gold dinar 
had been a historical standard among Muslims for centuries. It is not a 
modern innovation or theoretical construction. Hence to answer the above
 question, one simply has to go back to history, particularly the time 
of the Prophet Muhammad peace be upon him.
The Prophet pbuh is reported to have said: The system of weights and 
measures is the system of the people of Medina (Sahih Bukhari).
History of the Gold Dinar During the Prophet’s Era in Medina
At the time of the Prophet pbuh the Muslims did not mint the gold dinars
 yet. The Prophet pbuh accepted the Roman Byzantine gold solidus, also 
known as the bezant, as the monetary standard for Muslims. In this is 
wisdom. It was this coin that circulated among the Arabs for decades 
before the Muslims minted their own coins. The Prophet would have not 
accepted it if it were not Islamic in nature, i.e. it promotes the 
maqasid al Shari’ah. It also has to be a standard that is just and 
stable; and facilitate trade and business even among Muslims and 
non-Muslims. In fact the first Islamic gold dinars were not minted until
 about half century after the demise of the Prophet pbuh, by the fifth 
Umayyad caliph Abd al-Malik ibn Marwan in the year 75H (697CE).
Since the gold coin of the Eastern Roman Byzantine Empire, the 
solidus, was the coin accepted by the Prophet pbuh and was circulating 
among the Muslims, it is this coin we need to research and understand. 
Surely the Islamic gold dinars minted by the later Muslim rulers would 
follow this standard. Before we go to this, let’s look at the purpose 
and functions of the gold dinar.
Function of the Gold Dinar
The gold dinar played the role of money in Islam. Hence it eliminated 
problems generally associated with barter trades, like double 
coincidence of wants and the problem of divisibility. However, as money,
 it also enabled people to specialize in whatever they do best and hence
 increased productivity, output and trade; and thereby increased the 
standard of living of the people. Hence among the most important 
function of the gold dinar as money was as a stable measure of value. By
 this, people are able to exchange goods and services in a just manner 
and able to save for future consumption and investments, transact in 
credit and repay debt in future. Al Ghazzali and Ibn Khaldun rightly 
asserted that Allah SWT created gold and silver as measure of value. 
Hence gold and silver are the standards by which the values of all 
things are measured.
Indeed, the current global monetary system that is based on fiat 
money has this stable measure of value missing since the collapse of the
 Bretton Woods in 1971. Hence it is void of a numeraire or an anchor 
that links the monetary sector to the real economy. I would assert this 
as the fundamental reason for the current collapsing of capitalism.
When anything is taken as a standard or measure, it has to be ‘pure’ 
and simple so that people can easily relate to it. Length is measured by
 kilometer for example. A kilometer is defined as the distance travelled
 by light in vacuum in 1⁄299 792.458 second. The kilogram on the other 
hand is defined as the base unit of mass in the International System of 
Units and is defined as being equal to the mass of the International 
Prototype Kilogram (IPK), which is almost exactly equal to the mass of 
one liter of water[1]. Since international trade and business involves 
exchange of goods and services, what the world needs today is a stable 
measure of value against which the value of all things can be measured,
The Roman Aureus and Solidus
The Roman gold coin, the aureus, was among the earliest Roman gold 
coins, issued from the 1st century BC to the beginning of the 4th 
century. The aureus of Julius Caesar was struck 40 to the Roman libra 
pound. The libra pound is about 327.4gm. Hence, the coin weighed about 
8gm. Later, the emperor Nero reduced the weight of the aureus by minting
 it 45 to the pound, i.e. about 7.3 gm. The aureus was then replaced by 
the solidus that was first introduced by Diocletian around 301 AD, 
struck at 60 to the Roman pound of pure gold, weighing 
about 5.5gm each. Due to its limited quantity its economic effects were 
minimal. Hence, the solidus was reintroduced by Constantine I in 312 AD,
 permanently replacing the aureus as the official gold coin of the Roman
 Empire. The solidus of Constantine was struck at a rate of 72 to a 
Roman Byzantine pound of pure gold which equals 324gm, each coin 
weighing twenty-four Greco-Roman carats, or about 4.5 grams of gold per coin. Analysis
 of the Roman aureus and solidus, regardless of the size or weight, 
shows the purity level to be near 24 carat gold in excess of 99%.
 [Cite] Whenever the coin was taken in by the treasury, it was melted 
down and reissued. This maintained the evenness of the weight of the 
circulating solidi[2].
Hence it is obvious that the gold dinars of the Roman solidus that 
circulated among the Arabs during the advent of the Prophet pbuh were of
 fine gold, exceeding 99 percent purity.
 However, since the solidi circulating outside the Roman empire 
including the Arab world, were not used to pay taxes to the emperor they
 did not get reminted, and hence the soft pure-gold coins became quickly
 worn[3]. The average weight of the coins in the Arab world was about 
4.25gm, from the original weight of 4.5gm. Regarding this Bernstein said
 the following:
Less than fifty years after the death of Prophet Muhammad (peace 
be upon him), the Arabs emulated the great rulers of the past with the 
debut of their own gold coinage – the dinar – issued by the Caliph Abd 
al-Malik at Damascus in 75H. These coins, 97 percent pure gold and 
minted in great quantity gradually displaced the bezant as the major 
international currency, circulating throughout the Arab domains and 
everywhere in Christian Europe as well[4].
Coins of the time of Abd al-Malik ibn Marwan, unearthed by 
archeologists, have the weight of the dinar at about 4.25grammes[5], 
matching the weight of the worn solidi that circulated in those areas. 
One could attribute this slightly lower purity of the first Islamic gold
 dinar compared to the Roman coin to the fact this was the first 
attempts of Muslims to mint their own coins and hence their relative 
inexperience in the refining and minting technology compared to the 
Romans who had been doing this for centuries. However, undoubtedly the intention was to get a coin as pure gold as possible.
The Standard Weight of the Islamic Gold Dinar
Determining the standard weight should be easy but rather challenging. 
Easy because we are dealing with something that had existed 
historically, and not developing a theoretical one. One cannot totally 
rely on coins unearthed by archeologist in this regard because unearthed
 coins generally would have experienced some tear and wear depending on 
how long they had been in circulation and also due to some variance in 
the weight of individual coins themselves. Some could have been tempered
 through clipping and so forth. Hence it is best we resort to the 
definition of the coins as determined by the issuing authorities, like 
in this case the Byzantine Empire.
It is obvious that the Islamic gold dinar is based on Constantine’s 
Roman solidus which was struck 72 to the Roman Byzantine pound (litra) 
used for gold measurement. The litra pound is recorded to be 324 gm, 
which gives an ounce to be 27gm[11]. Hence the weight of the solidus is 
4.5 gm as recorded, equals one mithqal, equals 24 Greco-Roman 
carats[12]. This coin was frequently melted down and reminted to 
preserve the weight. However, as mentioned earlier, the coin circulated 
among the Arabs with an average weight about 4.25 gm due to tear and 
wear. Therefore the actual mithqal or dinar should weigh 4.5gm of pure 
gold. Indeed this was corrected by Caliph Umar ibn Abd al-Aziz during 
his reign, by changing the weight from 4.25gm to 4.5gm.
It was reported on the authority of Jabir that the Prophet pbuh said,
 “The weight of the dinar is 24 qirats[13]”. Also Ibn Khaldun asserted 
the following in al-Muqaddimah:
Know that there is consensus since the beginning of Islam and the
 age of the Companions and the Followers that the dirham of the shari’ah
 is that of which ten weigh seven mithqals weight of the dinar of gold… 
The weight of a mithqal of gold is seventy-two grains of barley, so that
 the dirham which is seven-tenths of it is fifty and two-fifths grains. 
All these measurements are firmly established by consensus.
From the above hadith and historical facts, it can be established 
that the Islamic dinar is of pure gold which equals one mithqal or 24 
qirats or 72 grains of barley, that equals 4.5gm in modern weight. 
Accordingly, a barley grain weighs 0.0625gm (4.5gm ÷ 72)[14], i.e. 
62.5mg. See Table 1 below. Also well-known is the fact that 7 mithqals 
equal in weight to 10 dirhams. Therefore, this also implies that the 
silver dirham is of pure silver, weighing 3.15gm (0.7 x 4.5gm) that 
equals 50 2/5 grains (3.15 ÷ 0.0625 or 0.7 x 72) as mentioned by Ibn 
Khaldun.
Inscriptions on the Islamic Gold Dinar
Generally, the Islamic gold dinar does not depict pictures of caliphs, 
rulers, animals or other living things in accordance with Shariah that 
discourages such practice. The first Islamic gold dinar, i.e. that of 
Abd al-Malik ibn Marwan, had inscription based on Quranic verses. One 
could notice that the earliest coins never had full Qur’anic verses on 
them. Perhaps this is because the early learned scholars could have 
opined that it is highly possible for people to bring coins into impure 
places like toilets and so forth; and also possible to lose them to the 
ground. Also because coins pass from hand to hand in circulation, one 
cannot afford to make a mistake in Qur’anic verses inscribed on the 
coins. Once circulated it would be extremely difficult to call them 
back, in case of mistakes.
For example the dinar and dirham of Abd al-Malik ibn Marwan had the 
following inscriptions: The obverse of the coin has as its central 
legend the Kalima Shahada, i.e. “There is no god except Allah alone, 
there is no partner with Him’. Around it is the mint date formula 
reading “In the Name of Allah. This dirham was struck in the year 79 
AH”. The reverse of the coin has the central inscription based on Surah 
112 of the Quran: “Allahu Ahad, Allahu-Samad, Lam Yalid wa lam Yulad wa 
lam Yakul-lahu Kufu-an Ahad”‘. The marginal legend is based on Surah 9, 
Taubah Verse 33. It states: “Muhammad is the Messenger of Allah, he was 
sent with guidance and the religion of truth to make it prevail over 
every other religion.” Note that these are not full Qur’anic verses.
Softness of 24K Gold Dinars and the Issue of Tear and Wear
The original gold dinar and silver dirham were made from pure gold and 
pure silver respectively. In the pure form they are soft and therefore 
get worn in the process of circulation. Nonetheless, gold and silver 
have the highest ductility and malleability among all metals[15]. The 
atoms of these metals are strongly bonded among them but however can 
move easily around them. Therefore even though the gold and silver coins
 can become worn in the process of circulation, the process is not easy 
though and rather is slow.
To address this issue of 
tear and wear, the Roman empire, as mentioned earlier, would melt down 
and remint the coins it receives as tax in order to maintain the 
standard weight of 4.5 grams.
Some quarters assert that the dinar should not be of pure gold since 
it would easily get worn out. They say that in about 3 years the coins 
may lose enough gold to be rejected as dinar. However, the Roman solidus
 that was circulating, for decades, outside the Roman empire had a 
weight of about 4.25 grams, with some going as low as 4 grams[16] and 
people did accept them as dinars. It is our contention that the Islamic 
government, as the Roman empire, should continuously remint the coins to
 preserve the weight of the coins.
Zakat on the Dinar and Dirham
It is important to note that the basis for the Prophet pbuh fixing the 
nisab for silver at 200 dirhams and the nisab for gold at 20 dinars was 
that either of these two sums represented, in his day, the market price 
of 5 camel-loads of grain or, in other words, of one year’s provision of
 essential food-stuffs for an average family. Accordingly, the value of 
one dinar during the prophet’s time was equal to 10 dirhams. Hence the 
basis for the nisab was not the physical count of the dinar but rather 
the purchasing power of the money. [Roy Jastram]
Hence it may not matter whether the dinar is 22K or 24K because the value of each will be based on their respective gold content.
 Henceforth, the nisab for silver and gold must be established on the 
same basis as practiced by the prophet pbuh, i.e. on the proportionate 
value of the year’s provision of essential foodstuffs in relation 
thereto, as dictated by the prevailing market price. Therefore, nisab 
for gold and silver must vary from year to year in conformity with the 
price fluctuations of essential foodgrain[17].
The Modern Implementation of the Islamic Gold Dinar
When the gold dinar gets implemented in the modern world, it would 
surely rely heavily on the internet. Gold-based interest-free electronic
 credit is the most desirable form of money (using cards, internet, 
mobile phones, computers etc). Here, the gold dinar would predominantly 
play the role as measure of value that involves only the recordings of 
credit transactions that are periodically net-off. Such system is not 
akin to fractional reserve banking because this system does not create 
new money and does not involve the transfer of credits for payment 
purposes. Therefore, in this system the need for physical dinars will be
 much minimized. The periodic settlements can be done even using gold 
bars and not necessarily using gold dinar coins. Also the system permits
 real-time electronic audits.
Such electronic interest-free money is desirable because it fully 
takes advantage of the concept of money as a measure of value, as a 
means for keeping score. Hence practically there will be no situations 
of shortage of money that can plunge an economy into recession and 
thereby give hoarders of money the advantage to charge interest on 
borrowings. Since the system does not create new money, it will not 
create inflation.
Conclusion
Islam as inherited by Muslims from the Prophet pbuh is a complete religion. As the following verse from the Holy Qur’an asserts.
This day have I perfected your religion for you, completed My favour upon you, and have chosen for you Islam as your religion (Al-Maidah 5-3)
Being a religion that is complete without defects or shortcomings, it
 needed no human efforts to perfect it, solve or rectify any 
shortcomings.
As far as monetary standards in Islam are concerned, the words dinar 
and dirham are mentioned in the Qur’an. These precious metals are to 
play the role of measure of value for just economic and business 
transations. As Islam is pure, its measures of value must be pure too. 
Pure makes it easier for standardization for all nations and people, 
without ambiguity, forex risk; simply a pure reference point, an anchor,
 a numeraire.
But as for all who lay up treasures of gold and silver and do not 
spend them for the sake of Gods – give them the tiding of grievous 
suffering [in the life to come]:
With simple deductions using historical facts, we ascertained that 
the standard for dinar and dirham are 4.5gm of pure gold and 3.15gm of 
pure silver. Hence, the correction of weight from 4.25gm to 4.5gm by 
Umar ibn Abd Aziz. In the present time, we cannot mint a coin inferior 
to that of Abd al Malik ibn Marwan. Hence the WIM standard of 4.25gm of 
917 gold and 2.975gm of fine silver for dinar and dirham respectively 
are erroneous because the coins would have about 13.4% less gold and 
5.6% less silver respectively than the historical standards.
The use of 22K would lower 
the nisab and if people were to pay zakat on it, I guess they would not 
be punished for lowering the hurdle, but nonetheless 24K is the standard
 The value of the 22K will be based on the pure gold content of the 
coin, anyway.
Hence it may be trivial to argue whether the gold dinar is 22K or 24K
 since the gold content will determine their respective value, play the 
role of measure of value, and form the basis for payment of zakat based 
on one-years provision of food-stuff. However since the Prophet pbuh 
said that the system of measure is the system of Medina, I contend that 
it should be perfectly alright to mint the Islamic gold dinar according 
to that of the time of the Prophet pbuh i.e. a 24K gold coin of 4.25 
grams in weight. Also since modern electronic payment systems are likely
 to be the way forward, the 24K fine gold should be the basis of a 
standard measure.
Reference
Bernstein, Peter L., The Power of Gold – The history of an obsession, John Wiley, 2000
Porteous, John (1969). “The Imperial Foundations”. Coins in history : a 
survey of coinage from the reform of Diocletian to the Latin Monetary 
Union.. Weidenfeld and Nicolson. pp. 14–33
Subhi
Kitab Adh-Dharaib fi as Sawad
Hunwick, John, Islamic Financial Institutions: Theoretical Structures 
and Aspects fo the Application in Sub-Saharan Africa, in Credit, 
Currencies and Culture – African Finanical Institutions in Historical 
Garrard Perspaectiv, Ed. Endre Stiansen and Jane I. Guyer, Elanders 
Gotab, Sweden, 1999. P86
Timothy, Akan, Weights and the Gold Trade, London 1980,
▪ Islam is complete.
▪ Qur’anic verse on gold and silver – Allah must be referring to gold and gold mixed with other metals
▪ If dirham is fine silver, why dinar is not fine gold?
▪ Roy Jastram
▪ Rome was attacked 476AD, thereafter Eastern Byzantine empire existed.
▪ Byzantine emperor was Justinian who governed with his wife Theodora from 527 to 565.
▪ 9 May 2004 – On this day in A.D. 330, Constantine founded the city of Constantinople
[1] The IPK is made of a platinum–iridium alloy and is stored in a 
vault at the International Bureau of Weights and Measures in Sèvres, 
France. However, the weight of this alloy has been changing over time, 
and hence the call for a redefinition of the kilogram.
[2] Wikipedia
[3] Porteous, John (1969). “The Imperial Foundations”. Coins in history :
 a survey of coinage from the reform of Diocletian to the Latin Monetary
 Union.. Weidenfeld and Nicolson. pp. 14–33
[4] Bernstein, The Power of Gold – The history of an obsession, p67.
[5] Subhiì, 1976: p427
[6] The Roman Byzantine Empire lasted till 1416 CE. However, the Persian
 Sassanid Dynasty that was responsible for the silver dirham that 
circulated among the Arab, ended much earlier around 644CE.
[7] Kitab Adh-Dharaib fi as Sawad, p65 as referenced in http://www.islamhariini.wordpress.com
[8] Abd al-Malik’s dirham was close to 3gm, but the Roman solidus 
weighed 4.5gm. Hence Umar ibn Abd Aziz’s remark of the ratio 7:10.5, 
i.e.
[9] Archeological gold dinars of this period weighed in the range 4.4gm 
to 4.6gm. To what weight he corrected the dirham and the dinars depends 
on what standard dinar he was comparing the dirhams to. We contend it 
must be the Roman solidus, that weighed 4.5gm.
[10] All dinars are indeed of pure gold but constrained by mining and 
refining technologies of the time. By the Fatimid period Muslims seem to
 have perfected the technology; something the Romans had known much 
earlier.
[11] 27gm was the old Roman-Byzantine ounce from which the original 
solidus standard had been derived. See Timothy Garrard, Akan Weights and
 the Gold Trade, London 1980, p215.
[12] Traditionally, 1carat (the mass of a carob seed) equaled the weight of 3 barley grains or 4 wheat grains.
[13] Qirat is carat. In today’s jargon, 24K is also used to denominate pure gold.
[14] This weight of a barley grain is computed based on the above 
statement by Ibn Khaldun. Barley grains do vary in weight, that is 
subject to change due to moisture content etc. The International Systems
 of Units set the barley grain as equal to 0.06479891 gm
[15] Ductility is a solid material’s ability to deform under tensile 
stress, i.e. the material’s ability to be stretched into a wire. 
Malleability is a material’s ability to deform under compressive stress,
 i.e. the material’s ability to form a thin sheet by hammering or 
rolling. Both of these mechanical properties are aspects of plasticity, 
the extent to which a solid material can be plastically deformed without
 fracture [Wikipedia].
[16] That is, a loss of about 5.5% to 11.1%, but we are not sure for how long the coins circulate before losing that much.
[17] Zayas, Farishta G. de, The Law and Institution of Zakat, The Other Press, 2003, p74.