Are you remodeling your home or building a new one? Or are you simply replacing tops in your bathroom or kitchen?
If so, you have few checks you should keep in mind in order to select a quality granite slab.
Check patches on surface of discoloration, hairlines, cracks. These signify a weak slab and will cause problem. They add to the natural beauty of the stone, but sometimes can also make it more likely to get damaged, especially when the thickness of the countertop is less than 1 inch. Ask the stone fabricator or seller to explain how those imperfections affect the stone, and whether they can cause harm.
Granite contains holes throughout, no matter how much you polish it. The question is: how many holes and how big are they. Look closely at the reflection of light in your granite to see the pitting. The fewer pits there are, the better (and the easier it will be to clean if you ever roll flour on it). Quality granite has fewer, smaller holes.
Check artificial coloring as it is a huge problem with stones now a days especially the black granite. Stone merchants rub industrial oil on the surface to intensify the color and creates a deep black and rich polish that wears off in matter of weeks.
Verify artificial color by rubbing with cloth dipped in kerosene oil or white petrol. If cloth brings black color then it is a fake color.
QUALITY CUTTING OF SLAB FROM BLOCK
Also check the back of the slab for circular mark. These are made by kerosene cutter which is used to cut the block of granite slab. This shows that the cutting process is wrong. The granite slab should be water cut having no circular mark on the back of the slab.
Low quality granite often isn't even the same thickness for its whole length, we've seen a slab lose 6mm in thickness from one end to the other. Even if it's not immediately obvious, take a look along the edge. If the thickness isn't consistent, that will need to be bolstered during fitting, costing you time and headaches.
Check it's a consistent colour from one end to the other, otherwise when you join two pieces, they won't quite match.
The hardness of granite varies, and with software granites it's quite easy to mark them with an ordinary kitchen knife. Once marked, you can always tell, even if you have it polished out (you'll still see the dip). Ask for a sample and try to mark it.
Checkout our stock of premium granite & marble slab at GMI STONE DFW
Please share if there are more checks to spot a quality granite slab.