The problem is that the "pure" siverware is usually only around 92% pure. Silver is too soft for flatware They add copper to it. Hence the name "sterling silver". Pure silver does not have that problem. As a added note, things like mayo, eggs, and mustard have sulfer in them. you planning on eating with that HS?
you might want to double check that it is not sterling silver. If it is not used for food at all there is no reason for it to tarnish since pure silver cannot tarnish, it's chemically impossible.
Sterling silver tarnishes simply by being in contact with the air. Pure silver is, like gold, impervious to tarnish, oroxidationon the surface. It is the alloy metal with attracts the tarnish. Rub your thumb over an apparently shiny piece of sterling silver. You may find a dull smudge on your skin that indicates that the sterling silver is beginning to tarnish.
Pure silver has a brilliant white metallic luster. It is a little harder than gold and is very ductile and malleable, being exceeded only by gold and perhaps palladium. Pure silver has the highest electrical and thermal conductivity of all metals, and possesses the lowest contact resistance. It is stable in pure air and water, but tarnishes when exposed to ozone, hydrogen sulfide, or air containing sulfur. The alloys of silver are important.
i dont get my info from wikipedia i get mine from pubmed... or governement sites that are primary sources...ozone or O3 is used for everything especially to kill bacteria in water and to break up organic compounds to analyze their makup... i would hate to tell you the air you breath is not that clean and rain does can sulfuric acid and other chemicals that harm the environment...