Identifying Coins by Colour & Corrosion Flashcards
(6 cards)
1
Q
Green patina
A
Brass or copper alloy
2
Q
What does iron indicate?
A
Iron only used by forgers, often as a core of the coin (test with magnet)
3
Q
Plain colour (not green)
A
Copper
4
Q
How to identify brass?
A
Brass is the same colour as the old pound coins
5
Q
Difference between as and dupondius?
A
As is copper, dupondius is brass - sometimes look similar
Look then for radiate crown on emperor indicates dupondius, lunar crescent for empress (usually later coins)
6
Q
How to identify gold / silver / copper by corrosion?
A
Gold coins do not really corrode
Silver often is a bit corroded
Copper corrodes very easily
