Blue tourmaline (indigolite)

Origin:

United States, Western Australia, Sri Lanka

Hardness:

7–7.5

Color:

light blue to blue-green
It supports lung and immune function as well as brain health; it is used to treat chronic sore throats, insomnia, and night sweats, as well as sinus infections and bacterial infections, and helps burns heal more effectively.
Blue tourmaline (indigolite)