Black Howlite + Lava Stone Friendship Diffuser Bracelet Details Black Howlite + Lava Stone Friendship Diffuser Bracelet Unavailable $1.00 White - $1.00 Black - $1.00 Color White Black Select options Use with your Essential Oils on the black lava stone beads! Re-apply every 3-4 days to maintain aroma.Read more Use with your Essential Oils on the black lava stone beads! Re-apply every 3-4 days to maintain aroma.