Generally 90% silver, 10% copper. There were minor adjustments in the 19th century but anything you find from the 1870s forward will be so-called "coin silver".
Pre-1965 silver coins are worth more for the silver than face value.
The weights of pre-1965 silver coins are as follows. Dimes: 2.5 grams. Quarters: 6.25 grams. Half dollars: 12.5 grams. Silver dollars: 26.73 grams.
They're all worth at least $2 for their silver content.
Quarters minted after 1965 do not contain silver. Only pre-1965 were struck with a certain percent of sliver.
US quarter dollars issued through 1964 were 90% silver. Quarters issued from 1965 onward (except for some proof coins made for collectors) contain no silver.
Pre-1965 silver coins are worth more for the silver than face value.
The weights of pre-1965 silver coins are as follows. Dimes: 2.5 grams. Quarters: 6.25 grams. Half dollars: 12.5 grams. Silver dollars: 26.73 grams.
An pre-1965 U.S. dime weighs 2.5 grams total. The silver content of pre-1965 dimes, quarters, halves, and silver dollars is 90% silver by weight, so there is 2.25 grams of silver in an unworn, uncirculated pre-1965 U.S. dime.
All pre-1965 US quarters and dimes are 90% silver.
All New Zealand silver coins from 1933 to 1946 had a silver content of 50%. From 1947 onwards, all New Zealand "silver" coins were made from a copper-nickel alloy.
They're all worth at least $2 for their silver content.
Quarters minted after 1965 do not contain silver. Only pre-1965 were struck with a certain percent of sliver.
If they are pre-1965 they are worth about $2.10 each in silver content, if they are dated 1965 or after, they are worth only 10 cents.
US quarter dollars issued through 1964 were 90% silver. Quarters issued from 1965 onward (except for some proof coins made for collectors) contain no silver.
Silver coins minted before 1965 contained 90% silver with 10% copper. The coins' weights are as follows. Dime: 2.5 grams Quarter: 6.25 grams Half dollar: 12.5 grams Dollar: 26.73 grams To get the weight of just the silver, multiply those weights by 0.90.
Yes, the reason why quarters (and dimes, and half dollars) dated 1964 and earlier are worth more than their 1965 and later coins is because they are 90% silver.
Last year for Canadian silver content coins was a partial production in 1968. A magnet will pick up newer quarters but not pre 1968 silver coins this includes dimes as well.