Select and glue the letters reversed on the EVA foam or acetate scrap. Test it.
If your stamp is perfect, smooth and cut the clay.
Press the EVA with the word on clay.
Make holes with the toothpick.
Let it dry for about 2 or 3 hours.
Paint with acrylic paint and toothpick on the outside of the letters.
Wait the time to dry and put the jump rings and chain to make your necklace.
Use your necklace ;)