look for a 3/4 " masonry drill bit... i havn't seen many masonry bits for a dremel though. try using a lubricant when drilling to lower the temp so you wont wear out or break the bit as quickly. id estimate 5-12 USD for a masonry drill bit. good luck..
Delph Reviewed by Delph on . need dremel help none of my dremel bits work on this rock for some reason...well...they do...but very ineffectively.....does anybody know what dremel bit would make short work of these without breaking them?i need the circumfrence of the hole to be at least 2 centimeters. im planning on putting these beads into my hair, but i need to drill them out first. would a diamond bit work? how much do those run for? Rating: 5