First:  Get a goooooood resperator.  Don't want no rocks in them thar lungs.  Honestly, Steve, I would consider taking it to the local granite shop and have them do the cuts.  Just sayin'.

I have a couple of money sinks, do those count?

/badda bing!

Bullet Bob wrote:

First:  Get a goooooood resperator.  Don't want no rocks in them thar lungs.  Honestly, Steve, I would consider taking it to the local granite shop and have them do the cuts.  Just sayin'.

Agree that it might be best to let a local granite shop do the cutting, at least check out what they would charge..  Cutting the length, using the methods other have suggested, is doable with a diamond blade in a circular saw, but will leave a rough edge .  This may not be a big as it is for the garage.  Cutting out the sink presents a bigger challenge.
And, get someone else (or two) to move that thing! 
 

Yeah, probably just take it to get cut, since nobody offered a easy way to do it.   Rough edge is no problem as the sink will cover the cuts and the one long cut will be by the wall.  I plan to tile everything around the sink.

Cutting granite is fairly easy.  I'm modified countertops a lot over the years.  A diamond blade in a circular saw will produce a straight cut if you do it right.  The key is to let the blade cut, not try to force it through the material.  I like to layout the cut with blue tape and use that as a guide.  You can also clamp a temporary fence to the slab using padded quick clamps, and run the saw down the fence.  You'll also want to support the top and make sure the drop (piece you're cutting off) can't fall free, because it can tear a piece out of the top when you get close to finishing the cut.  I will have an assistant hold that piece loosely to prevent it falling. 

The trick is that the edges then need to be concealed because the cut won't produce a smooth edge.  You can buy the discs for a 3" air angle grinder to dress the edges, but costs start to mount.  If I need a dressed edge I'll take it to a local shop who makes tops for me and they will usually just dress an edge or two while I  wait. 

ChrisH IA wrote:

First off, is this real Granite; Gravestone quality? I ask because it will absorb any oil if it isn't sealed. And it will need resealed 

Will it cause problems with the rock?  Or just be stained?  Just wondering.

Every couple of years I use “DuPont - Bullet Proof “granite sealer on our kitchen and bathroom counter top and back splash.
Also the granite came from the supplier pre sealed, or so I was told.
So far after about 5 years all the surfaces are stain free but, I have yet to verify that it is actually bullet proof.

So, to sum it up.

It won’t hurt the rock.

It just won’t be as pretty the day purchased.

I didn’t know hydrogen peroxide would etch stone.

I know the use of citric acid and muriatic acid for etching concrete

Neat stuff to me.

Last edited by Nos681 (9/11/2020 8:30 AM)

One thing you can count on here is that someone will have the answer, just ask!!  and sometimes you dont even have to ask!!

It is in a garage.
It is black.

Bearing Bob wrote:

MS wrote:

It is in a garage.
It is black.

BAM!

Exactly