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I have seen some shops and seen yellow patches in granites. Why is this ,as they mentioned only in granite tamil nadu will have this and once laid it won;t have any problem>
Some others saying it will absorb stains and get patches as years passes and looks bad. Is it so?

desity and porosity of the granite to be checked before buying

The stones from the TN quarries are rich in Iron content. Hence, the stains. Over a period of time, it will even turn black!!

some granite person saying 1. During cutting if the patch is there , just reject it and take the good pieces as this patch will come only if the granite is open in the shops. Once we lay it won;t expand or create new one as underside is covered under cement mortar
2. Some other person saying rich iron content so definitely it will come on the long run
3. Some other person saying if we remove the stains(like coffee/water/lime etc) instantely then this patch won;t come.

Not sure which is right and difficult of identify as i heard couple of karnataka/andhra as well has same problem. Please share your experience.

Please do help on this ...............

Barring paradise, all other stone types from TN are affected. There is absolutely no chemical treatment, which will help you recover the original shade. Karnataka & AP ones do not have this issue.

sam_m400 wrote:patch will come only if the granite is open in the shops. Once we lay it won;t expand or create new one as underside is covered under cement mortar

- NOT TRUE!! Stones do have absorption quality.

can you please little elobrate ? " NOT TRUE!! Stones do have absorption quality."

If i go for yellow stone lke amber yellow or tiger skin etc from TN do we have any problem as though patches comes it will be yellow only which may not be noticed with the original color.

Can you please specify any yellow color granite other than from TN as i haven't seen anything from any other region where yellow is available ? I have seen one or two but they are not completely yellow....

How is the look of having a yellow color granite for flooring?

Please do help

yellow looks good, provide you have a extra large area of flooring. what is the name of the granite that is causing you heart burns??

looking for tiger skin (It has yellow with mix of grains of black spots and white) or yellow white (yellow waves with white background) ..... which is from TN..

I visited Shree Vishnu Granite which is near Kanakapura road and Nice road intersection. The sales guy explained the reason for yellow patch which is same as @m3_07 explanation above.
He said iron ore content in some TN granites are more. So when you cut the granite and leave it open in the air, the iron starts rusting and starting giving out yellow colour. He also showed few cut slabs where I could see colour changing effect.

What I liked about this place was,
1) When I enquired about some of the granite, sale guy explained me why I should not buy it, like one reason above. This was unique and I didn't see/experience in other places or shops.
2) polishing of granite looked very good, they had layed few granite on the floor for display and I have to touch with my hands to convince myself there is no glass kept on top of granite. He mentioned they have purchased Rs.45cr worth polishing machine and even other ppl come and get their granite polished there.

What I am not so happy is, there starting range is from Rs. 200