It is possible there is a staining problem on granite countertops that you may be experiencing: One is an issue between the reaction of epoxy or resin on granite slabs (applied at the factory) with solvents in Acetone (used to clean granite prior to sealing). The other occurs when sealers react with a super-glue’s (used to smooth out rougher, chipped spots) activator or accelerator spray which can result in a green/blue-green stain.
Granites with higher levels of quartzitae are especially at risk for the "green bloom" effect. If activator spray is applied too heavily a green coloration will appear within a couple of days. Activators react with iron or copper minerals in the stone which creates the green color. Fabricators use epoxy glue and a hardener/activator spray which reacts with sealer, causing a color change to occur more commonly found on white and yellow granite countertops. The staining appears on the edges for the most part, however the staining can also appear on the surface. The best solution for this seems to be (remove Mangia Macchia) Mangia Macchia (repace with TeBloom) from (remove Bellanzoni) Bellanzoni (replace with Tenax), which effectively removes the stains with a few applications.
For more advice on how to maintain your granite countertops, or if you have any further questions regarding this issue or others, visit us at marbleandgranite.com for the assistance you need. Marble and Granite Inc (http://www.marbleandgranite.com) offers fabricator/store pricing comparisons, extensive custom sizing for just about any area you want to cover, and one of the largest selections of marble, granite, soapstone and slate countertops to give you the best fit. Our showrooms in Milford, CT and Westwood, MAcan offer you the chance to meet us in person to both view the materials up close and further discuss what will work best for you.