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The Global Insight

What does a granite fissure look like

Author

Mia Horton

Updated on March 31, 2026

Fissures look like small, hairline cracks in the polished surface of the slab. Fissures are most clearly visible in granite varieties that display large crystals like Verde Butterfly, Delicatus Gold or Marron Cohiba. … Fissures appear on the polished surface of a slab. A crack is a physical separation in a slab.

Can you feel a fissure in granite?

The stone is still contiguous along a fissure. In other words, there is no separation within a fissure. You may be able to feel the fissure and you can see them, but if the surface is finished correctly there should not be any gap or depression or canal of any significant depth.

What is the difference between a crack and a fissure?

A crack is a broken piece of countertop that is most of the time, chipped, uneven, and widely separated and is usually the result of man-made stresses. On the other hand, a fissure is a part of the stone that resembles a crack, yet it is a result of natural geological formation or mineral crystallization.

What is a stone fissure?

Fissures are elongated but extremely narrow openings along the boundaries of crystalline structures in the stone. The visible separation usually remains within the depth of the stone, although it sometimes can go entirely through. Fissures often appear in more than one place on the slab and are rarely straight.

Is it common for granite countertops to crack?

Cracks in granite are more common than you think! Typically, cracks occur in granite or stone countertops as a result of stress during handling, fabrication, transportation or installation of the countertop.

Why do granite countertops crack?

Although, granite is naturally heat resistant, having been formed through heat, constant exposure to heat over extended periods can weaken the stone leading to cracks. The damage is extensive, especially if the stone is cold at the time of heat exposure, and the difference in temperatures is large.

How do you fix a granite fissure?

Cracks and Breaks on granite can’t really be fixed, what can actually be done is filling the cracks with epoxy or acrylic so that they don’t show. If it’s a broken piece of granite you want to mend, again, epoxy can be used to glue it together.

What causes holes in granite?

Holes in your granite countertop are called pitting. Pitting is a small crack, indentation or fissure in the natural stone’s surface. It can be caused by the polishing process or an inherent, unique mark of the stone. … Natural stone is that – natural – and each piece will be unique and have natural imperfections.

Can granite crack after installation?

Cracks in granite are “normal” in the sense that they do somewhat commonly occur even with great care upon installation. Granite is very heavy, very rigid and hard to handle in the best of conditions.

Is a fissure bigger than a crack?

A fissure is an elongated opening that is a natural geological formation or mineralogical crystallization. A crack on the other hand, is a broken piece of stone that is typically uneven, chipped, or widely separated.

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Are fissures in quartzite normal?

Quartzite typically tend to have fissures and pits on the surface which are filled & sealed with resin at the factory overseas. Quartzite is harder than Granite as its composition is predominantly quartz – generally over 90%. You can cut on it, put hot pans on it, etc.

What's the difference between a fissure and a crack in granite?

Fissures are natural features in a granite countertop, but cracks are damage caused by outside impact. Cracks can be narrow or wide, and usually only appear in one place on the slab, and may go through the entire depth of the stone.

Will a hot pan crack granite?

Homeowners don’t need to worry about damaging their countertops with everyday use because granite is quite heat resistant. Placing a hot pan on a well-maintained granite slab will not cause it to crack or weaken. Just remember that repeatedly placing a very hot pan on the same spot may cause granite to discolor.

How do you repair a hairline crack in granite?

Repairing your Stone. Fissure and Chip Repairs: You want to use a clear resin, epoxy, or acrylic adhesive for repairing small cracks and fissures. In the Countertop Stone Repair section of our store you will find recommended products such as Lamlock Infiltrating Epoxy, LiquiGlass, and Tenax Tefill Kit.

How much does it cost to repair cracked granite?

Filling a chip or scratch will cost between $200 and $500. Larger cracks or failing seams may cost up to $700 to fix. For smaller, do-it-yourself jobs, you’ll only pay for the materials. They’ll run you somewhere between $10 and $100.

How do you repair cracked granite?

  1. Determine the depth of the crack. Small cracks that go with the grain of the granite are normal, no need to worry about them. …
  2. Create matching granite dust. …
  3. Mix epoxy and the granite dust. …
  4. Mask off the area. …
  5. Apply the epoxy.

Can granite crack easily?

However, it is possible for granite to crack from improper care, wear and tear, and sometimes it may even be a natural part of the stone. Here are a few things that can bring about a crack in your granite countertops. Like we said, sometimes cracks in granite can be natural.

Can you fix a crack in a granite sink?

But, there is nothing to worry much as small cracks in granite sinks are repairable and these should be timely repaired, not just to restore its stunning looks, but also to prevent any further damage. Small-size granite sink cracks can be repaired at home without any professional help.

Can granite crack from cold?

Granite shouldn’t crack in cold weather, as long as it’s properly sealed. It’s most vulnerable during the thawing season, so you should pay extra attention to your sealant to ensure that it’s properly applied.

What's wrong with granite countertops?

At issue is whether some granite countertops emit dangerous levels of radiation, especially the gas radon, which is the second leading cause of lung cancer after smoking. Experts agree that most granite countertops emit some radon and even other types of radiation.

What should seams in granite look like?

A good seam should be completely flat and flush with the countertop and should seem inconspicuous, if not invisible. A poor fabricator will leave a bumpy, visible seam, which will greatly diminish the look of the overall countertop.

Will my cabinets support granite?

Will my cabinets support granite counters? The weight of the granite is spread over a large area and should pose no problem. Cabinets seldom need reinforcement to support granite counter tops.

Can you fix a hole in granite?

Several places where they get heavy use have divots, with most of the holes in the darkest parts of the granite. … A: There are several options for patching divots in granite and other natural stones, including two-part epoxy, polyester resin mixed with hardener, and acrylic resin cured with ultraviolet light.

Should granite countertops have pits?

Most granite slabs won’t have pits, although any slab of granite could develop a few pits over time. Typically not a big deal. … Pros will use an epoxy or resin adhesive for granite repair of pits, but they can rarely get an exact color match. Thus, the repair is always visible.

Why does my granite feel rough?

The reason for gritty surfaces on granite kitchen countertops is most likely the fact that they were not correctly or completely finished in the first place. … Poor quality granite slabs may have rough patches and simply not feel smooth as glass.

What is a concrete fissure?

Concrete cracks or fissures are the most frequent damage to structural concrete elements, whether they are floors, columns, walls or beams. These are characterized by fractured lines, sometimes interconnected, which expose the interior of the concrete.

What is longitudinal fissure?

a deep groove that marks the division between the left and right cerebral hemispheres of the brain. At the bottom of the groove, the hemispheres are connected by the corpus callosum. Also called interhemispheric fissure; sagittal fissure.

How do you cure a fisher?

  1. Externally applied nitroglycerin (Rectiv), to help increase blood flow to the fissure and promote healing and to help relax the anal sphincter. …
  2. Topical anesthetic creams such as lidocaine hydrochloride (Xylocaine) may be helpful for pain relief.

What is a marble fissure?

Fissures: The look like hairline cracks, but are most often just surface features that will not widen or grow over time. They have no bearing on the integrity of the stone. A rule of thumb…if you can’t feel it, it’s a fissure. If you can, it’s a crack. There’s no need to repair a fissure.

Can a crack in quartzite be repaired?

We mix epoxy filler with quartzite matched colors to achieve the optimal color match of quartzite countertop. We fill the cracks with epoxy filler by using a blade. We let it cure for some time. When epoxy is cured, we cut quartzite in the repaired area.

Are cracks in marble normal?

There are several varieties of marble cracks, including hairline cracks, a fissure, a surface separation, and a full-thickness break. Hairline cracks are the least dangerous. In most cases, if left alone hairline cracks will not worsen or affect the stability of your stone. But they are annoying to look at.