1968 canadian silver coins.

[Srg1]

If the 68 canadians coins are 50% silver will they still stick to a magnet?I have 2 68 canadian dimes 1 of them sticks and the other does not.I believe 1 of them mite be 80% silver that dont stick,and the other one is 50% silver or has no silver,not sure yet.I find it weird that i also got some 90s american dimes that are not silver of course but yet they dont stick to the magnet?Do the 50% canadian silver coins look any different than 80% silver coins?And why would the american ones that are not silver not stick to the magnet.But the non silver canadian ones do.

 

[jewelerdave]

Lots to do with the metallurgy,
A lot of Canadian coins are very high in Nickel content, Pure nickel is magnetic.
American coins are at most 25% Ni and less. hence no magnetism unless its a really really powerful magnet.
Coinflation.com has a lot of the alloys listed, otherwise wickipiedia etc, there are many resources for finding out coin alloys

 

[srcdco]

The silver ones won't stick to the magnet. That means that one of your coins is silver and the other one isn't. I don't know of any easy way to know if it's 50% or 80% silver. Based on that, anyone that you try to sell them to will usually only pay for 50%.
The reason that the non-silver Canadian coins stick to a magnet is that they are 100% nickel. U.S. clad won't stick to a magnet because it has too much copper in it. You can verify that by checking Canadian 5 cent coins. Those issued between 1922 and 1982 are 100% nickel (with a few exceptions) and are magnetic. Those issued starting in 1983 until they changed to plated steel (those with a small 'P' below Queen Elizabeth's bust) have the same composition as U.S. 5 cent coins and are not magnetic. They will work in U.S. vending machines, since they can't tell them apart.

Scott

 

[GMan00001]

1968 Canadian dimes are either 50% silver or nickel (the silver ones don't stick to a magnet)
1967 Canadian dimes are either 50% or 80% silver.

Same for Canadian quarters.