No. All general circulation Irish "silver" coins are made from a copper nickel alloy.
If they were made from real silver, they would be worth a few pounds rather than a few pence.
Zero. No Eire (Irish) 10 Pence coin has ever contained any silver, they are made from a copper-nickel alloy.
All Eire (Irish) 50 Pence coins were made from a copper-nickel alloy.
Zero silver content. All general circulation Irish "silver" coins minted since 1951 have been made from a copper-nickel alloy.
There is no silver content in any general circulation British coin from 1947 onwards. The 10 Pence coin is made from 75% copper and 25% nickel.
The Eire (Irish) 10 Pence coin was first issued in 1969 and last issued in 2000. It was made from an alloy of 75% copper and 25% nickel.
If it is a "Silver" coin, it will say so on the case it came in.
Assuming you refer to the 1981 British 25 Pence coin (Crown), it is made from a copper-nickel alloy. If you have a sterling silver Proof coin, it will state somewhere on the packaging that the coin is made from sterling silver.
Three pence piece (thri'pence) abbrieviated as 3d, a British coin made originally in silver and later in brass.
No. They would be worth far more than 10 pence if they were made from Silver. The British 10 Pence coins are made from 75% copper and 25% nickel. No circulating British coin has any silver content.
The Irish Halfcrown coin contained 75% silver alloyed with 25% copper from 1928 to 1943. The next Irish Halfcrown to be minted was the 1951 coin which, due to increases in the cost of silver, were made from a copper-nickel alloy until the last minting in 1967.
The Eire (Irish) 20 Pence coin minted from 1986 to 2000, is made from a nickel/bronze alloy and are not plated. Any discolouration (browning or yellowing) will most likely be due to light tarnishing of the coin.
The British 20 pence coin is made out of an alloy of 84% copper and 16% nickel.