Stone and Tile PROS | Natural Stone, Tile, Concrete
FOR PROS ONLY : BACKSTAGE
Your Stone and Tile Information & Resource Super Site

Glossary of Terms

Glossary is usually defined as an alphabetical list of technical terms in some specialized field of knowledge. This knowledge base glossary provides a collection of knowledge base documents that define many technical terms. These terms are arranged alphabetically, but you can quickly jump to a specific term by selecting its first letter from the index of the knowledge base glossary below.

OBSIDIAN
A glassy phase of lava, usually black
OFF FALL
A remnant, or extra piece, from a partially cut slab. Off falls are often used for samples or additional projects
OFFSET
A course or unit that is set in from the course directly under it, the opposite of a projection
OGEE
A stone molding with a reverse curved edge, concave above, convex below
ONE-MAN BOULDERS
Rough stone under 150 pounds
ONYX
A variety of quartz in crystalline form of calcium carbonate. It is characterized by a structure of parallel brands each differing in color or in the degree of translucency
ONYX MARBLE
A crystalline from, commonly microcrystalline, of calcium carbonate deposited usually from cold water solutions. It is generally translucent and shows characteristic layering. Commercially, onyx is considered a marble because it can be polished
OOLITIC LIMESTONE
Rock consisting mainly of calcite, made up of largely oolites or granular particles (generally tiny fossils or fossil fragments) that have calcium coatings. A calcite-cemented calcareous stone formed of shells and shell fragments, practically non-crystalline in character it is found in massive deposits located almost entirely in Lawrence, Monroe, and Owen counties in Indiana, also in Alabama, Kansas, and Texas. This limestone is characteristically a freestone, without cleavage planes, possessing a remarkable uniformity of composition, texture and structure. It also possesses a high internal elasticity, adapting itself without damage to extreme temperature changes
OPALIZED
The introduction into a rock of siliceous material in the form of opal, a hydrous silicate
OPHICALCITE
Sedimentary rock mostly made of serpentine, gabbro, often with red alteration from formation of hematite. Binding agents can be calcite, dolomite, magnesite
ORGANIC
Designation of any chemical compound containing carbon (some of the simple compounds of carbon, such as carbon dioxide, are frequently classified as inorganic compounds). To date, nearly one million organic compounds have been synthesized or isolated. Many occur in nature; others are produced by chemical synthesis
OUT-CROP
Rock protruding above or at ground level
OUT-OF-WIND
Generally refers to veneer stone. To be out of wind is to have the arris of the stone not in parallel or perpendicular lines; stone which is out of wind has an irregular or rustic appearance
OVER BURDEN
Waste stone, earth or other quarry material covering useful stone