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2. List of sandstones - Wikipedia

   en.wikipedia.org/wiki/List_of_sandstones

   This is a list of types of sandstone that have been or are used economically as natural stone for building and other commercial or artistic purposes. Trans-regional [ edit ]

3. Turquoise - Wikipedia

   en.wikipedia.org/wiki/Turquoise

   Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.

4. Sandstone - Wikipedia

   en.wikipedia.org/wiki/Sandstone

   Sandstones comprise about 20–25% of all sedimentary rocks. [ 1 ] Most sandstone is composed of quartz or feldspar , because they are the most resistant minerals to the weathering processes at the Earth's surface.

5. Arenite - Wikipedia

   en.wikipedia.org/wiki/Arenite

   Arenite. Arenite (from the Latin arena, "sand") [1] is a sedimentary clastic rock with sand grain size between 0.0625 mm (0.00245 in) and 2 mm (0.08 in) and containing less than 15% matrix. [2]

6. Gemstone Meanings: Power and Significance of the 25 Most ...

   www.aol.com/gemstone-meanings-power-significance...

   Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.

7. Lithic fragment (geology) - Wikipedia

   en.wikipedia.org/wiki/Lithic_fragment_(geology)

   Lithic fragments, or lithics, are pieces of other rocks that have been eroded down to sand size and now are sand grains in a sedimentary rock.They were first described and named (in their modern definitions) by Bill Dickinson in 1970. [1]

8. Conglomerate (geology) - Wikipedia

   en.wikipedia.org/wiki/Conglomerate_(geology)

   They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding. [ 1 ] [ 2 ] [ 3 ] Fanglomerates are poorly sorted, matrix-rich conglomerates that originated as debris flows on alluvial fans and likely contain the largest accumulations of ...

9. Nugget Sandstone - Wikipedia

   en.wikipedia.org/wiki/Nugget_Sandstone

   Nugget Sandstone near Red Fleet Reservoir, Uintah County, Utah. Uniform grain size and these large cross-stratification are indicative of an ancient sand dune.