These lava rocks are for the essential Oil Diffuser necklace. I suggest one lava rock per scent. These are 14mm in size and fit perfectly into the Diffuser balls.
NOTE: this is just for lava rocks only. The diffusers necklaces can be found at this listing https://www.frecklefacejewellery.com/products/essential-oil-diffuser-locket-necklace
