Designed with porous lava stone, which absorbs and then gently diffuses essential oils throughout the day. Black lava stone is warm and grounding, and white howlite is calming and stress-reducing. Our essential oils are 100% natural, vegan, and contain no toxins, synthetics, fragrances, parabens, or dyes. HOW TO USE: ADD A DROP OF ESSENTIAL OIL TO BLACK BEADS. USE WITH ANY ESSENTIAL OIL THAT YOU DESIRE!