Green, mottled, shiny ceramic diffuser for essential or fragrance oils or simmering wax; we sell all of these products. The color of the well may vary in color from the photo. To use with oils: Fill the well with warm water, add a few drops of either oil, light a tea candle and place it in the space provided inside the body of the diffuser and enjoy. Do not let the liquid in the well dry up, do not overfill. To use with simmering wax: May not be suitable for wax, try a very small amount first. Follow the directions in the package of wax, light a tea candle and place in the space provided inside the body of the diffuser and enjoy, follow wax removal instructions on the package of simmering wax. @4.5" high.