Natural Stone Definitions
I
Igneous
Any of the various volcanic rocks, solidified after the molten state, such as granite. Igneous is one of the three main rock classifications. Compare with metamorphic and sedimentary.
ILIA (Indiana Limestone Institute of America)
A trade organization established for the dissemination of information on limestone standards, recommended practices, grades, colors, finishes, and all technical data required for specifying, detailing, fabricating, and erecting Indiana Limestone. Publishers of the Indiana Limestone Handbook and other technical publications, founded in 1928.
Impregnators
Any applied repellent that penetrates the stone and resides below the plane of the finished surface. Impregnators may be hydrophobic (water-repellent), oleophobic (oil repellent), or both, and are used in some stone varieties to increase stain resistance.
Incise
To cut inwardly or engrave, especially in a “V” shaped profile, as in an inscription.
Inscription
Lettering cut in stone.
Isolation Joint
A joint separating a concrete slab from another element, such as a column or wall.
