Stone

Stone

A piece of rock that is quarried then worked into a specific size or shape to serve a function as a useful building or paving material.

Industry: Building materials

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Stone

jumper

Building materials; Stone

In ashlar patterns, a piece of stone of higher rise than adjacent stones, used to end a horizontal mortar joint at the point where it is set.

phenocryst

Building materials; Stone

In igneous rocks, the relatively large and conspicuous crystals, in a finer-grained matrix or ground-mass.

riprap

Building materials; Stone

Irregular broken and randomly sized pieces of rock used for facing bridge abutments and fills; stone thrown together without order to form a foundation, breakwater or sustaining wall.

scoria

Building materials; Stone

Irregular masses of lava resembling clinker of slag; may be cellular (vesicular) dark-colored and heavy.

lead buttons

Building materials; Stone

Lead spacers in solid horizontal joints to support the top stones until the mortar has set.

field stone

Building materials; Stone

Loose blocks separated from ledges by natural processes and scattered through or upon the regolith (soil) cover; applied also to similar transported materials, such as glacial boulders and cobbles.