When it comes to countertops, there are a few different ways that you can seam granite. The most common way is to use what’s called a wet saw. This type of saw uses water to cool the blade and prevent the granite from overheating and cracking. Wet saws are available for rent at most hardware stores.
Another option is to use an angle grinder with a diamond blade. This method is a bit more challenging, as you need to be careful not to overheat the granite or crack it. However, it can give you a nice, clean seam if done correctly.
Finally, you could also use a hand-held router with a diamond bit. This tool requires some practice to get the hang of, but it can produce beautiful results. Just be sure to go slowly and carefully so you don’t damage the stone!