Article Number: 10 | Rating: Unrated | Last Updated: Wed, Feb 28, 2007 at 12:30 PM
Unlike marble, granite is not a calcite based stone and is not generally vulnerable to acids. However, some stones, even though they are marketed as granite, may in fact have calcium in their makeup. Furthermore, there is one acid that will severely etch, pit and dull a polishedgranite surface. This acid is known as Hydrofluoric acid(HF) and is found in many rust removers. If you have experienced etching on granite surfaces you may want to check the label and see if it contains Hydrofluoric acid. If it does, the granite may need to be repaired.
CALCITE A common crystalline form of natural calcium carbonate, CaCO3, it is the main mineral composing most limestones and geological marbles. Also called calcspar
ETCHING Occurs when stone is eaten (or neutralized) by an acid. It often looks like and is mistaken for a watermark.
GRANITE A very hard, crystalline, igneous rock, gray to pink in color, composed of feldspar, quartz, and lesser amounts of dark Ferro magnesium materials. Black ’granites’ are similar to true ’granites’ in structure and texture, but are composed of different minerals
MARBLE A metamorphic crystalline rock composed predominantly of crystalline grains of calcite, dolomite, or serpentine, and capable of taking a polish
POLISHED The finest and smoothest finish available in stone, generally only possible on hard, dense materials. Or, a glossy finish which brings out the full color and character of the stone
Posted - Wed, Feb 28, 2007 at 12:30 PM This article has been viewed 2173 times.
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