1979 Canadian half dollars come into varieties: one with the Queens bust rounded at the top, and the less common depiction with a pointed bust. Their value can reach $2.00 and $4.50, respectively. This, of course, depends on quality.
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
A 1964 Canadian half-dollar has a value of approximately $12 Canadian dollars. This value is dependent on the current silver market.
50 cents
With the date of 1979 the coin is a Kennedy half dollar, it's worth 50 cents.
The U.S. half dollar has never been made of gold. What you probably have is a gold-plated 1979 half-dollar. It's not really worth much above face value.
5 bucks
Unless it's in brand-new uncirculated condition, face value only.
Please post a new question with the coin's date.
The value of an 1896 Canadian half dollar depends on its condition. For example, such a coin in good condition is worth around 11.79 US dollars while an uncirculated coin has a value of more than 500 US dollars.
for a non-collector it would be 50 cents
There is no silver in the Canadian half dollar dated after 1967. If you have older coins (lucky you), the content is as follows: 1870 - 1919 92.5% silver 7.5% copper 1920 - 1967 80% silver 20% copper
With a date of 1979 the coin has no silver in it. 1969 was the last 40% silver circulating US half dollar. The coin is worth 50 cents.