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2. Concrete landscape curbing - Wikipedia

   en.wikipedia.org/wiki/Concrete_landscape_curbing

   Concrete landscape curbing (or concrete landscape bordering) is an alternative to plastic or metal landscape edging. Landscape curbing is made with various elements of concrete depending on the climate where it is being used. [1] Concrete landscape curbing has become more popular over the last decade with suppliers offering a variety of styling ...

3. Crushed stone - Wikipedia

   en.wikipedia.org/wiki/Crushed_stone

   Substitutes for crushed stone used as construction aggregates include sand and gravel, iron and steel slag, sintered or expanded clay or shale, and perlite or vermiculite. [7] A crushed stone barge in China Crushed stone laid as a road base. Crushed stone is a high-volume, low-value commodity. The industry is highly competitive and is ...

4. Stone slab - Wikipedia

   en.wikipedia.org/wiki/Stone_slab

   A stone slab is a big stone, flat and relatively thin, often of rectangular or almost rectangular form. They are generally used for paving floors, for covering walls or as headstones . [ 1 ]

5. Fieldstone - Wikipedia

   en.wikipedia.org/wiki/Fieldstone

   Fieldstone is a naturally occurring type of stone, which lies at or near the surface of the Earth. Fieldstone is a nuisance for farmers seeking to expand their land under cultivation, but at some point it began to be used as a construction material. [1] [2] [3] Strictly speaking, it is stone collected from the surface of fields where it occurs ...

6. Knapping - Wikipedia

   en.wikipedia.org/wiki/Knapping

   Flintknapping a stone tool Knapping is the shaping of flint , chert , obsidian , or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools , strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration.

7. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

8. Concretion - Wikipedia

   en.wikipedia.org/wiki/Concretion

   Marleka fairy stone from Stensö in Sweden Iron sulfide concretions, such as the Kansas Pop rocks, consisting of either pyrite and marcasite , are nonmagnetic. [ 79 ] On the other hand, iron sulfide concretions, which either are composed of or contain either pyrrhotite or smythite , will be magnetic to varying degrees. [ 80 ]

9. Lapping - Wikipedia

   en.wikipedia.org/wiki/Lapping

   The lap or lapping plate in this machine is 30 cm (12 in) in diameter, about the smallest size available commercially. At the other end of the size spectrum, machines with 2.4-to-3.0-metre-diameter (8 to 10 ft) plates are not uncommon, and systems with tables 9 m (30 ft) in diameter have been constructed.