She Bakes Marbles In The Oven Then Dumps Them In Ice Water. The Result? STUNNING! If youre looking for a great way to make your own gifts, you have to check out this amazing solution for making your own DIY crystal necklaces. This project allows you to make faux crystal necklaces by recreating the symmetrical pattern using simple thermal techniques. All youll need are clear and colored marbles, a baking sheet, a mixing bowl, super glue, ice, bead caps, rings, eye pins, and necklace cord. To begin, preheat your oven to 500 degrees, and arrange the marbles on a baking sheet. Bake the marbles for 20 minutes, and remove them with caution. Next, dump the hot marbles into a bowl of freezing cold ice water. The temperature shift will crack the inside of the marbles, revealing and intricate design. The outside should remain smooth. Fasten the bead cap and eye pin and fill them with super glue and then let it dry overnight. At the end, you should have a beautiful set of beads. 