It left a hole the same as if I had hit the wall with a hammer. If I hadn't had the face shield on, I'd probably have lost an eye. Hammers and Picks - Whenever we hit rocks with these tools, chips result. The physics of the break is such that some chips will fly towards the hammerer. Rock saws - high flash point oil is required.
Small ones can bind and turn the slab sideways with fingers pinched.
Lungs - many of the materials we use in our shops are classified by OSHA as dangerous to our lungs. Especially avoid dry working on rocks with the resulting dust. Fire - There are many possible sources of fire in a shop. D. Read the extinguisher to know where it works. In our shops, there are chemicals which can harm us in many ways - eyes, lungs, skin, and more.