This necklace was designed as a diffuser necklace, however, it can be worn without the use of essential oils if you prefer. It has a light blue dyed lava bead in the center and it is accented by aquamarine and Czech glass beads. The chain is a high quality plated rolo chain. The necklace is about 16 inches plus it has an 2 inch extender so it can be worn up to 18 inches long. Oil Disclaimer: Due to the varied nature of essential oils, the wear of the lava bead overtime cannot be determined. Please only use oils on the lava bead.