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Natural Stone Industry Glossary

Search Results: 14 Terms Found
OBSIDIAN 
A dark, hard volcanic rock (normally black) formed by the rapid solidification of lava.
OFF FALL 
The remnants from slabs of marble, granite, or other stones. They can be used for other projects.
OFFSET 
A design feature when pieces of material including wood, stones and tiles are intentionally set in an opposite manner.
OGEE 
An edge finish, as for countertops, that feature an S-shaped curve.
ONE-MAN BOULDERS 
Stones that weigh less than 150 pounds.
ONYX MARBLE 
A dense and semi-transparent crystalline rock comprised of calcite and sometimes aragonite.
ONYX 
A semiprecious agate stone that is a variety of quartz featuring different colors and layers with varying degrees of translucency,
OOLITIC LIMESTONE 
A sedimentary rock formed from spherical grains in concentric layers. This calcite calcareous limestone is often formed from shells and is available in some areas of Indiana, Texas, Alabama and Kansas.
OPALIZED 
A stone that has an opalescent nature of reflecting a variety of colors and hues as does a natural opal.
OPHICALCITE 
A metamorphic rock that is similar to a serpentine marble; can be white due to high calcium content, green, or red.
ORGANIC 
Naturally occurring compounds that are biological in origin.
OUT-CROP 
Rocks or stones that appear above ground level.
OUT-OF-WIND 
In masonry, typically refers to veneer stones that do not feature perpendicular or parallel lines that are irregular or rustic in their appearance.
OVER BURDEN 
The waste stone in quarries that covers the useful or prized underlying stones.