http://www.marble-institute.com/industryresources/techbulletin_0307truthradongranite.cfm


The Truth About Granite & Radon/Radiation

Over the past few years, there has been some consumer confusion and concern about rumored radiation levels occurring in natural granites used for residential countertops, floor tiles, etc. The origins of this concern are advertisements published by manufacturers of competing materials. Levels of radiation from granitic products, while technically measurable, are in fact, just small fractional values of established thresholds for environmental safety. The reader is encouraged to study the information contained within this pamphlet to further understand how these levels are quantified and to appreciate the relative insignificance of any radiation attributable to natural stone surfaces.

The following report addresses: a) granites, radioactivity and natural stone; b) is radiation/radon in granite dangerous? No; c) radioactivity in granite; and includes