Hello,

I recently got a piece of granite that I would like to use as a bar top in the basement. It's about 1.5 inches thick, and about 16" wide. it is finished (polished, or whatever) on the top and long sides, but the ends are rough and irregular. I need to crosscut them to square them up. I've seen a bunch of different masonry blades at the local big box store, ranging in price from 10 bucks to over 50. Is this the type of app these blades are made for?

I'm not to concerned about the ends being perfect, as I will probably band the whole thing with wood, but I would like to obviously avoid any chip out on the top surface.

 

A diamond blade would be your best bet. A continuous rim would give you the cleanest cut with the least chance of chipping the edges.

A continuous rim blade would have no slots or groves on the outer diamond matrix.

Ask the people at the "local big box store' for some advice on this for blades are rated to cut different types of material. You could spend $50 on a blade and it could end up laboring through the cut causing chips in the process.
Many of them will list just what they are rated to cut. Dewalt sells a good diamond blade not sure if they make a continuous rim blade though.

You could use a groved bladed also it could do the job just fine.

If you interested in polishing the edges you might be able to find a polishing kit.

 

there are good reasons why you may not find a blade that specifies "granite". it needs to be wet cut. a diamond blade is a must. you can find a granite yard that will charge you for this one cut and that would be much less expensive than buying the blade. there are also health hazards to cutting this stone, it contains silica which can be breathed in and cause very ugly lung issues. or if you are going to cover the edges go ahead and raise the wood edge to cover your rough edge. get creative this way and it could turn out very nice. good luck.