http://read.thestar.com/?origref=#!/article/5159a11d7b1eacf7f404491b-world-s-most-dangerous-jobs-india-s-agate-grinders-die-making-cheap-jewlery
It's obvious some of the members don't have a liking of masks(respirators).
I have a problem using it too. It's obviously not comfortable, nor as nice as smelling burning jade, but please wear it. And work with water, please. You may wear a mask, and dry grinding may be faster, but your family doesn't wear masks. And the dust can get kicked up.
Statistics in google scholar articles don't say it as well as this piece does. One in three contract silicosis and will most likely die from it.