natural stone
A product of blank" >nature. A stone such as blank" >target="_blank" >granite, blank" >marble, blank" >target="_blank" >glossary/limestone/" class="glossaryLink" data-cmtooltip="06e8da16b488221295c39252c91cb29a" blank" >target="_blank" >limestone, slate, blank" >target="_blank" >glossary/travertine/" class="glossaryLink" data-cmtooltip="ea17a0a1d4bbd670fcb40e3c0878ca30" blank" >target="_blank" >travertine, or blank" >target="_blank" >glossary/sandstone/" class="glossaryLink" data-cmtooltip="3e2335997395084a2508d9c629c6022b" blank" >target="_blank" >sandstone that is formed by blank" >nature, and is not artificial or manmade. (Marble Institute, 2011)
