Depending on where you live-and depending on where you keep the crystal-you may be in need of Quakehold!"s museum gel. Here"s how it works: simply pinch off a bit of the non-toxic gel and adhere it to the bottom of the object you want to secure, then place it on the shelf. The gel will hold it fast in the event of an earthquake. If you ever want to move the object to another location, simply twist and pull to separate it from the shelf. The gell is fully reusable, and it doesn"t leave marks on wood or other materials.--Josh DettweilerWhat"s in the Box Four-ounce jar