DIY Projects & Crafts How to Drill a Shell for Jewelry-Making By Martha Stewart Editors Martha Stewart Editors An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on September 20, 2018 Share Tweet Pin Email Photo: BRYAN GARDNER Sources Micro Max cordless rotary-tool kit, by Dremel, 8 volt, $89, homedepot.comDiamond-coated twist drill bit (#56), by Eurotool, $6, metalliferous.com What You'll Need Materials Kitchen sponge Shallow plastic container Shell Craft drill Diamond-coated drill bit, 1 millimeter Instructions Place sponge in container. Fill with enough water to just cover sponge. (The water will keep the drill from overheating and the shell from cracking.) Set shell on sponge, top-side down, and hold securely with your fingers, as shown. Keeping edges barely submerged, slowly drill through shell.