So often it is difficult to make a decision when pouring over the jewelry display cases at an art show. The piece with the onyx stone or the lapis? The simple ring or the more elaborate one? Sharon Johnston has the solution. She makes all of her silver rings with interchangeable stones so buyers in a quandary no longer suffer indecision. Her stones come in a variety of sizes and a paintbox of colors. Each ring can do double or triple duty. Not only does this make it easy to buy for yourself but also for holiday gift giving. Johnston’s prices are $75 to $1800.