Natural Onyx CollectionThese stunning Natural Onyx Stone Vessels are individually crafted to capture natures infinite beauty! No two are the same, but expect the color variation to be slight, most comprised of whites, creams and translucent tones. The best part of this vessel is they are a one time purchase! Once youre done enjoying, simple order your refill and switch out your glass insert. You can also buy multiple inserts at the same time with different scents so you can