I didn't need anything in particular, we were just browsing but as I looked at the crystals she had on display an obsidian arrow head caught my eye. I didn't know why I needed it or wanted it, but I did, so I bought it (it was only a couple of pounds).
It has been sitting on my table ever since, until today when I decided I needed to work with it, so into research mode, here is what an obsidian arrow head can do:
Works with the base chakra.
It's energies are used to help with scrying, grounding, protection, survival instincts, shamanic healing, creativity and intuition. It protects from negative energies and helps us to stop having negative thoughts about ourselves. It also teaches us self discipline.
The shape of the arrow represents truth and following your right path, going in the right direction.
It is also known as the 'wizard's stone' as it was used in the past to create magical mirrors.
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Obsidian is hard and brittle and when fractured has very sharp edges.
I think I may put it on some cord and tie it to my staff :-)
Sources - thecrystalhealer.co.uk