copper-based alloy

510

debased silver

324

silver

93

bronze

36

leaded bronze

17

copper

12

brass

10

Hadrian

90

Nero

70

Antoninus Pius

66

Diocletian

61

Gordian III

45

Trajan

44

Philip I

44

Aurelian

43

Gallienus (sole reign)

43

Elagabalus

38

Claudius II

35

Severus Alexander

29

Trajan Decius

25

Claudius

24

Vespasian

22

Commodus

20

Roman Republic

20

Septimius Severus

20

Domitian

14

Caracalla

10

Valerian and Gallienus

9

Trebonianus Gallus

9

Macrinus

9

Carinus

8

Otho

8

Galba

7

Uncertain

7

Nerva

6

Caligula

6

Maximinus

4

Pescennius Niger

4

Rhoemetalkes I

4

Antiochus IV of Commagene

3

Abgar VIII

3

Vitellius

3

Carus

2

Gordian I and Gordian II

2

Agrippa I

1

Aemilian

1

Tacitus

1