You masy not have heard of this word before.

It is the lava of the Hekla volcano in Iceland

Animals grazing in this area may develop all kind of bumps-bony growths

In short: homeopathic hekla lava [D6] has been used for all kind of “bone-problems”[“exostoses”] , teeth and jaw problems, gum problems, back problems [with bony exostoses], with heel spurs [“dorban”] I have seen some good results.

[An exostosis, also called a bony spur or osteoma, occurs when a bony growth extend beyond a bone’s usual smooth surface.]

https://heartofhomeopathy.com/materia-medica/h/hekla-lava