Platinum and Rhodium wears off. Anytime from 6 months to 10 years. Depending on what jewelry you have on. Rings are the first to go. Because you wash your hands frequently & exposed to chlorine. Gold wears off silver, same situation. Even super tiny flecks of gold comes off wearing solid gold. If you're wearing black, you can see it.
JTV is fascinating. Almost everything, except for solid gold (10K and all) is covered with either Rhodium or Platinum. What a TV Network! QVC only offers the covering occasionally. If you love silver, be prepared to clean them after wearing them. Otherwise let it tarnish quickly. Or wear silver 24/7. They won't tarnish then. I have a silver ring my husband gave me 12 years ago. Have never taken it off...ever. Has never tarnished.
So true about buying jewelry from JTV.. It's fun for a while, but you're wasting money on the stuff. I have gemstones made from solid 18K & platinum from Gem Shopping Network, And it's worth the money to have jewerly that will last forever.