Nailed Cross Religious Men's Essential Oil Diffuser Necklace - Leather Cord. Show your faith and love of essential oils all at the same time! An antique silver cross is joined with wooden beads and a lava diffuser bead. This unisex diffuser necklace is comfortable to wear with a very soft brown leather cord. The charm part of the necklace attaches with a clasp, allowing the changing of lava stones. The beads slide down over the lobster clasp while wearing, allowing a seamless yet functional necklace. This necklace comes with 2 additional 15 mm lava stones.