Polish your jewelry the good (enough) way! You easily can shine up gold and gemstone baubles without using any elbow grease. Just fill a small dish with unflavored sodium-free seltzer and a drop of dish soap, then plop in your valuables. The bubbling action of the soda plus the foaming of the soap will bring out the sparkle — no scrubbing required. What not to try this with: pearls, turquoise, silver or costume jewelry.