Of course. And "coin silver" only refers to the US standard of 90% pure silver coins. Most other countries (especially in the British empire) used to use sterling silver. Coins have used many different alloys, for example, post WWI Canadian Coins are 80% silver, silver UK coins dated 1920-1946 are 50% silver, some ancient "silver" coins are known as billion coins and they contain very little silver, and Mexico issued a 1 peso coin in the late 1950s and 60s that was only 10% silver!
Alloys are frequently used to give a coin a particular color, or because a pure element may not have the right properties for coinage. In the US, layers of alloys and / or pure metals are used in what are called "sandwich" coins. These layers are chosen so that the outside of the coin has a particular appearance (silver-colored or gold-colored) but the entire coin has electromagnetic properties that can easily be distinguished in vending machines, transit fareboxes, and so on.
According to the 2000 blackbook price guide a s. African 1950 5 shilling coin is silver. I assume this is 100%. because it is stated if is less than ie. 50%. South Africa never made 100% pure silver coins, those that are not 50% silver would have a silver content of 83.5%
A silver dollar weighs a little less than an ounce.
It's still worth 5 or 6 dollars for its silver content. A scrap dealer will offer somewhat less because they pay wholesale.
You are asking about a 50 Cent coin (KM#56) from Canada. The coin weighs 11.6638 grams and is 80% silver, giving it an Actual Silver Weight ("ASW") of 0.3 troy ounces. With silver at US$17.88 per troy ounce (as of April 1, 2010), the "melt value" of the coin is US$5.36. Numismatically, it is not worth a lot more than that - Uncirculated examples may be worth up to about 25% over "melt."
About $3 for its silver content. A dealer will pay less.
About $1.90 or so for the silver content. Keep in mind though that for low purity coins like war nickels, most coin dealers offer substantially less than spot on them.
850 sterling silver is an alloy that contains 85% silver and 15% other metals, typically copper, which enhances its strength and durability. Unlike the more common 925 sterling silver, which has 92.5% silver, 850 silver is less expensive and is often used for jewelry and decorative items. It retains a bright finish and is more resistant to tarnishing compared to lower silver content alloys. However, it may not be as widely recognized or valued as traditional sterling silver.
The coin is still one ounce of silver under the paint, the people I deal with have never payed less for painted silver eagles.
The marking "835" on jewelry indicates that the piece is made of 83.5% silver, which is slightly less pure than the more common sterling silver standard of 92.5% (or 925). This marking is often found on silver jewelry from Germany and some other European countries. The "835" stamp signifies a higher silver content compared to lower-grade silver alloys, ensuring a certain level of quality in the piece.
This is not a coin made by the US mint. These coins generally have no collector value. If the coin is silver it will be worth more but if it is only silver plated with copper underneath it will be worth less.
Value is a little less than spot price of silver at time of sale.