One of humankind's oldest and greatest technologies is making artificial stone. Brick, plaster, concrete—all were invented thousands of years ago to replicate the strength and utility of stone in places where rocks were scarce.
Are these really rocks? I think so; they have every important attribute of rocks, except that they aren't natural. They're better than natural. See What Is a Rock? for more discussion.
 Adobe |  Lime Kiln |  Lime Kiln Fire Bay |  Inside a Lime Kiln |
 Mortar in a Stone Wall |  Plaster |  Plaster and Brick |  Brick and Mortar |
 Brick Tile |  Concrete Sidewalk |  Sidewalk Cross Section |  Aggregate in Concrete |
- Graphic Index
- Text Index
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