SUN DESIGN Aroma Lamp, Hexagonal shape, 4 x 4 inches. Our soapstone aroma lamps are the perfect way to diffuse aromatherapy oils into your home or office. Exquisitely hand-carved, they come ready-to-use. Simply add a few ounces of warm water and 4-10 drops of fragrance oil to the dish on top, place a tea light candle in the bottom, light and enjoy!