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Where Do Granite Slabs For Countertops Come From? How Is Granite Made? I’ve Seen The Process Firsthand!

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By Randy

Mother Nature is awesome in many ways. The mind-boggling forces involved that create the unique color combinations, striations, and inter-mingling of minerals with rock are incomparable and beautiful!

If you have any of the following questions about granite, stay tuned… because I’ve got the answers for you!

  • Where does granite come from?
  • How is granite made?
  • Where is granite found?
  • Where do granite countertops come from?
  • How are granite countertops made?


My Experience With Granite Slabs

It’s amazing to have the opportunity to see, firsthand, hundreds of types of exotic and classic granite slabs waiting to be shipped to fabricators to be honed into granite kitchen countertops and islands.

The process of making granite slabs for sale in the U.S. is awe-inspiring. Here is how granite countertops are made.

I am lucky enough to have had that opportunity — because there’s a granite slabs wholesaler located next door to where I’m currently working.

Being a big fan of unique, high quality homebuilding materials, I just had to make my way to their door and get to know the folks who work there. With camera and notepad in hand, I went a knockin’ and I’ve made a few friends in the granite slabs business!

M&F Granite is one of a handful of import wholesalers of exotic and classic granite slabs in the Atlanta area — but they have a great (direct) source that sets them apart from other wholesalers. They also import onyx, travertine, polished sandstone, quartzite, and marble slabs from various countries.

The guys I met that manage the granite slabs warehouse are Jeremy and Edward:

  • Jeremy has been in the granite slabs business for well over a decade. He can point out even the smallest imperfection in any slab — if there is one.
  • Edward once worked in the field mining granite slabs. As a result, he has an interesting perspective on the whole process of how granite is made.

Both gentlemen are very informative about the whole granite slabs process — so I feel fortunate to have met them.


Where Does Granite Come From?

I learned that 90% of the material at M&F Granite is imported from Brazil. They also import from Italy, Spain, China, and India.

Most of the marble comes out of Italy — and it is spectacular.

The onyx from Italy is incredible, too.

Seeing these products firsthand has been a real treat for me!

Here’s a summary of where most countertop materials come from:

  • Brazil supplies the majority of the granite slabs.
  • The majority of the marble originates out of Italy — as does Onyx. However, marble also comes from Spain.
  • China has a unique supply of brown granite that is popular among homeowners.


How Is Granite Made?

Here’s how much time it takes to get granite slabs for sale into stores:

  • It takes a total of about 30 days for the rock to go from where it has been for an eternity to the doorstep of the wholesaler.
  • It takes about 24 to 48 hours to slice one huge block into individual slabs of granite with gang saws.
  • It then takes about 2 days to apply the resin and cure it in the oven.
  • The remainder of the time is spent getting the granite slabs to market.

granite slabs before they are made into granite countertops

The process of mining the rock and bringing it to market is complex.

Luckily, M&F Granite has an interesting video that shows the entire process within approximately 6 minutes. The video is eye-opening and down to business.

Here’s how granite slabs are mined and brought to market:

The video above shows the steps they go through to mine and prepare granite slabs for sale:

  • Extract the granite slabs from the landscape
  • Ship the blocks for production
  • Use gang saws to cut the granite slabs
  • Prepare the granite slabs for resin filling and prepare the oven for curing (the resin seals fissures and pits)
  • Polish and buff
  • Quality control
  • Photograph each piece
  • Load containers for shipment overseas

I noticed that some of the more exotic-looking materials (such as onyx) and some of the rare granite slabs had a plastic mesh adhered to the entire reverse side with an adhesive. It’s there to simply reinforce some of the more delicate and exotic slabs — to keep them intact.

This next video shows some of the great looking granite slabs for sale — as they appear in the M&F Granite wholesale warehouse:


My Fascination With Rocks & Minerals

I’ll give you a little bit of background on my fixation on beautiful rocks and minerals — so you’ll have a better understanding of why I’m amazed by the entire process of turning granite slabs into countertops.

After visiting my brother at Pease AFB when I was 16, I lugged over 40 pounds of rocks home in a suitcase. I found those rocks on Mt. Washington.

I also have a few collected rocks in my yard that have significant sentimental value to me:

  • A flint rock the size of a softball that was collected by my grandfather in Ohio 50+ years ago and given to me by my mom. I understand that it is illegal to collect flint from that area now.
  • A pink marble chunk from the Pink Palace estate of Sam Tate.
  • A white marble chunk from a marble mining company in Tate, GA.
  • A few different, cool looking granite rocks from Lost Mountain — just down the road from where I live.
  • My yard also has a few large, very interesting quartz rocks that were there when I bought the house.