The Blue Regalite Diffuser Bracelet includes both Lava Stone beads and Blue Regalite beads. Blue Regalite is a grounding, strengthening stone that promotes stability, clarity, and inner-peace, making it ideal for encouraging compassion, contentment, and tranquility. The lava stone also known as “basalt” is a porous volcanic rock has been solidified from molten lava after conditions of intense heat and pressure. Select your favorite essential oil and put 1-2 drops on the lava beads. Once oil is applied to your diffuser bracelet the scent will diffuse for 6-12 hours. This allows you to change the essential oils you use! This bracelet is made with durable long lasting materials to prevent breakage. Each bracelet is uniquely handmade with naturally sourced stones, therefore, a slight variation in color combination, size, and shape may occur 16 cm - Stretchy elastic 8mm beads Nickel & Zinc Free