Tonight while finishing up the rock lining of Deep Cut I was in need of a specific size rock to fill a void. Scouring my collection I couldn’t find any that fit the spot. My attempts at cleaving a rock with a cold chisel and hammer failed dismally. I finally located a rock that fit the opening, but it was twice as deep as the gap I wanted to stuff it in.
I recently mounted a 10" masonry blade in table saw to trim some concrete tunnel parts. I wondered if that blade had the power to rip cut this 2 inch thick piece of rock. What the heck, you’ll never know unless you try 
I moved the saw outside and made a mat to protect the table from a section of newspaper. After donning my heavy duty safety goggles, my first attempt was to cut the full thickness in one pass. As soon as I got most of the blade engaged it was obvious I was going nowhere. So I tried a shallow cut, about 1/4 inch or so, and it cut quite quickly. I raised the blade repeating the cut ever deeper on each pass. By the time I was within a 1/4 inch of finished, I had worn enough off the blade that it wouldn’t raise high enough to cut through. I flipped the rock over and carefully finished the last 1/4 inch from the other side.
Success !!! The cut edge looks like polished granite, but it will never be seen. The natural edge will face out.
It was too dark by the time I had cleaned up and test fit the rock, so I didn’t get pictures. The cut rock will fit the space nicely. I’ll get some pictures in the morning before and after I install it.
