There are different levels of purity of silver. Pure silver (100% silver) is said “silver 1000”, you can not make jewelry because it is a very soft material, you must use an alloy with another metal. The .950 silver is an alloy of 95% silver with 5% copper. The .950 silver is the purest that can be found in the jewelry market.
The most common silver for purposes of buying and selling products is the .925 silver that contains 92.5% silver with 7.5% copper.