It is sterling. You can not make anything from 100% silver. It would fall apart. You need a little copper or something similar to hold it together and make it durable enough to be worn as jewelry.
Be warned. I bought a bracelet in Mexico and it is stamped .925 but is NOT silver. It appears to be silver plate. I was playing with my boys and a magnet stuck to it.
If you are shopping for silver, use a magnet to test it to be sure. A magnet will not stick to sterling or .925 silver.
Sterling silver (regardless of country of origin) is 92.5% pure silver. That's why it's marked 925. Sterling silver may also be marked SS instead of 925.
All silver and gold that is sold has to be marked to show its precious metal content. Pure silver and gold are too soft to hold a shape, and so base metals, like copper, lead and nickel, are added to give them strength.
The current price of silver is about $16.80 per ounce. One of the reasons it is valuable is that, besides being used in jewelry, it is also used in many manufacturing processes.
Don't throw it away. A jeweler can melt it down and make something new out of it for you.
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