When my granite counters were put in a few years back, the worker talked me into buying a marble- and stone-care kit.

I have an oil stain that is a bit larger then a quarter on my new bathroom vanity granite top. If the water beads up and does not darken quickly, then sealing your countertop is not required. Leathered granite is gorgeous and treated similar to polished granite for cleaning and sealing.

Genevieve, adhesive is applied to the back of the slab when they add the mesh to help hold it together.

Looked throughout and you could see more and 5 days later seems like it’s spreading or showing itself more to me. I have looked at so many granites – in outcrop, stone, gravel and microscopic slides and have never seen or heard of such a thing.

Ask the supplier to provide in writing the mineral content of the granite, identify the specific minerals that are turning green and the reaction and formula that causes the transformation, and ask for a small sample of the granite. It can be removed with a little heat from a small blue propane torch and a can of lemon scented easy off oven cleaner.

Could you show me a picture of the edge where the stain is, snap your photo on an angle up close showing the thickness of the stone and part of the top. Now wondering what you would suggest to someone who hasnÂ’t yet installed the granite, but would like to without it turning green. It is odd because it is only along the edge near the sink and it seemed to appear overnight like someone had spilled on it.

The interesting thing is that it’s only in areas of high usend the quartzite underneath our dish drying rack is still pristine – there is literally a rectangular area of unstained quartzite underneath the rack (as seen in photo). I have seen a counter top in ceaserstone blizzard that was similar to this it was just a grime that built up which method daily cleaner wasn’t getting.

I have found is to re-edge the stone (60-100 grit on up) and then seal the edge immediately. If natural iron can cause granite to rust orange, why wouldnÂ’t natural copper cause green oxidation?

I did some research, found out it was copper, and sealing it immediately after polishing stopped the oxygen in the air from turning it green. I pointed out the mica cause usually that needs a little shot of glue also because its like paper that flakes right out.

Or was something laid atop of the tiles that was wet and could have bleed through to stain prior to install?

If that isnÂ’t mold on the back wall, moisture from your setting material can sometimes absorb into the stone tile and affect these deposits.

Make a blend of warm water and baking soda and mix until you get the consistency of hand cream. Any handyman will do this for you, or call a local granite or tile store and ask them to do it. Some granite countertops — like the blues, blacks, and greens — are dense and often do not need sealing. Once this is done and the sealer is allowed to cure, the water or solvent base evaporates, leaving the resin only in the pores.

Lastly, placing a really hot pan on the same spot over and over can lead to scorching [blackening] on that spot. One thing for certain is that after spending good money on these a result like what we see isnÂ’t very pleasurable . White granite doesnÂ’t typically include minerals that change color to green after the slab has been cut or that appear green like that only on the edge.

I can’t think of any natural process that would turn the typical granite minerals in an otherwise white granite – quartz, feldspar, mica, amphibole – green in that way.

Tell them you are going to take it down to your local college geology department and get them to explain it to you because their explanation makes no sense whatsoever. Once the block is cut into slabs and polished its finished face is now exposed to the elements if they are kept outdoors the changes can be fairly quick and most of the time are present when you view your slab. You apply the poultice, cover it in a saran wrap, allow it to dry over night, and scrape off in the morning. Are you referring to the natural brown/green tone to the section of granite that has brown/green tones in it?

This granite is on the island and the other side of the kitchen and nowhere else does it have this green / brown variation, we could not tell if it was a water stain or normal granite variation. If you cant find this particular product and opt for something else its the microparticles and bleach are important. However, what the op seems to be talking about, green on the edge, is from copper in the stone oxidizing. Granite will absorb humidity not just from its polished surface but from the humidity in the air like a sponge, it will rust from the inside out. Yes, there are many stones with iron present, and yes they can oxidize (rust) and turn the stone red in spots or streaks.

The mica, micro cracks and pits in this stone is sealed up on the top with resin from the slab supplier but resin dosent penetrate deep enough into the stone so the edges remain porous and brittle.

On the other hand, if these are in fact repairs, the accelerator bloom makes sense, especially considering it isnÂ’t apparently happening anywhere else on the edges.

Considering the look of mold on the back wall, is there a water source near by that could be leaking?

This will etch the finish if it is in fact marble but the etching will end up looking way better than the result we see now.

Source: www.marble-cleaning-products.com/blog/how-to-remove-stains-discoloration-from-granite/
When my granite counters were put in a few years back, the worker talked me into buying a marble- and stone-care kit.I have an oil stain that is a bit larger then a quarter on my new bathroom vanity granite top. If the water beads up and...