13 Sep '17, 2am
925 sterling silver jewelry
Silver is a precious metal and, much like gold, is too fine to be utilized in its pure form. What does 925 silver mean? To make silver durable enough for use in jewelry, pure silver, which has a .999 fineness (99.9%), is often alloyed with small quantities of copper (7.5%). The copper is added to strengthen the silver and the resulting product is .925 sterling silver (92.5%). Acceptable quality marks for sterling silver include: sterling, sterling silver, ster, and .925 What is sterling silver? Sterling silver is an alloy of silver, which consists of 92.5 percent silver and 7.5 percent copper. Why does silver tarnish? Tarnish is a dulling which naturally occurs when silver reacts with sulfur or hydrogen sulfide in the air. Most people think silver tarnishes due to oxidation. But, chemically speaking, silver is not very reactive—it does not react with oxygen or water at nor...