[ RadSafe ] Radioactivity in Granite Countertops
S L Gawarecki
slgawarecki at gmail.com
Tue Feb 28 15:30:54 CST 2012
Dan covered the original question quite well.
As far as countertops go: "granite" is a generic term applied to
crystalline igneous and metamorphic rocks, and "marble" is a generic term
applied to crystalline limestones/dolomites, marbles, and serpentinites.
This makes us geologists crazy.
And yes, the properties of the various "granites" (and "marbles") can vary
regarding hardness and durability.
Stewart Farber wrote:
<< True granite to me has certain specific properties which would not be
in marble, or other types of dimension stone you mention. Your reference to:
the Colorado School of Mines Rock Classification Scheme - "CLASSIFICATION OF
ROCKS" definition as to what is true "granite" is interesting. If a stone
does not meet the classification of "true granite", has a buyer paid for and
not received a stone counter which has properties as to durability,
hardness, etc. that are not up to what it should have been?>>
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