How To Test Quality of Black Granites
Posted on March 12, 2011 by meaton
Black granite countertops are one of the hottest kitchen surfaces today, but with the trend has come many imitations that may be dyed or oiled to improve appearance. The truth is, there are many varieties of black granite that can be found in nature, and each variety will vary depending on the conditions of its formation and the location where it was formed.
Some black granites are more grainy and some are more uniform. For example, “Galaxy Black has an extremely dense black background with bright reflectors,” according to New England importer and wholesaler Marble and Granite Inc., “The gold specks are due to the presence of Bronzite.”
Some fabricators try to disguise natural variations, which can result in fading over time. The best way to ensure the quality of black granites is to only purchase first-quality materials and work with a reputable supplier. If you suspect a slab has been dyed or oiled to improve appearance, you can perform the following test to find out:
- Take a clean white cloth with acetone on it, and wipe the stone to see if any residue comes off.
- Take MEK (Methyl Ethyl Ketone) and apply to a different section. If there is any color transfer, the stone is dyed.