Feldspar crystals are white and will break down faster than the quartz crystals which are greyer.
Why did my granite turn yellow after leathering.
Waxes and other coatings can yellow with age.
Citrus or vinegar will actually cause etching on granite countertops.
This is caused by oxidation of iron within the stone and especially problematic with white marbles.
If improper cleaners are used this dirt begins to accumulate in the pores of the stone can will turn yellow.
Just like oil ink or markers can lead to stains and discoloration in a granite worktop.
The porous granite soaks colors and dyes often resulting in stains after lots of use or exposure to some fluids or objects such as oil based cosmetics food colored drinks and metal objects.
Oxidation is shown on the edge of the surface.
Citrus based cleaners used on them.
The proc ess is beginning to take place on the top surface of this granite headstone where a black weathering layer is de veloping.
When water seeps into your granite countertop it leaves a dark spot that evaporates in a few minutes and returns to normal.
As marble wears the highly polished surface begins to become scratched and worn.
Ink and other pigments.
When the carpet is not able to breath it is called off gassing and that is where the bht instead of dissolving in the air is pushed back down.
The wearing of this polish causes the surface to become rough and become a magnet for dirt.
Embedded dirt and grime can give the stone a yellow dingy look.
There are several reasons why a stone will turn yellow.
However not all granite worktops respond equally to pigments.
Granite is made up of.
If you re not certain what caused the stain consider its size shape and location to give you clues.
Certain stones will naturally yellow with age.
The crystals in the granite are being decomposed by hy drolysis.
This is what will cause the carpet to turn yellow in color.
Once the water based components evaporate the pigments or the dyes can seep into the surface leaving harsh stains.
Marble granite and stone do not like having acidic ie.
Ted said there was an acid reaction between the citrus and calcium carbonate that makes up the surface of the counter one that is probably not true granite but a composite.
Not a good thing.
But substances like cooking oils that don t evaporate can cause permanent stains if they re allowed to soak into the stone.