18cm Natural Black Lava Rock Rounded 8mm Stone Beaded Bracelet with Cute Silver Apple Charm that Is a perfect gift for yourself or for someone else special in your life. It is held together with a comfortable stretchy elastic band that conforms to most wrists with no problem. Also comes in small drawstring pouch for protection. Great Teacher's Gift To Tell Them Thanks for Helping You Or Your Child Grow. Every bracelet is unique and has special healing properties. Each bracelet comes carefully packaged and includes a note that explains the specific healing properties of the stones on the bracelet and includes a thank you note for a teacher if you are gifting it. Black Lava Rock is an amorphous stone, technically called an amorphous solid. Black Lava Rocks form due to the sudden cooling of molten rock that has melted over a wide range of temperatures, and breaks to form irregular or curved shapes. This stone originates from Mexico, associates with the zodiac sign Sagittarius, and connects spiritually with the Root & Earth Star Chakras.