Rock (geology) - Wikipedia
Rocks are composed of grains of minerals, which are homogeneous solids formed from a stone compound arranged in an orderly manner. The aggregate minerals forming the rock are held together by stone bonds. The types and abundance of minerals in a rock are determined by the manner in which it was formed. Many rocks contain silica (SiO2); a compound of silicon and oxygen that forms 74.3% of the Earths crust. …
List of U.S. state minerals, rocks, stones and gemstones ...
51 rows · Leaders of states in the U.S. which have significant mineral deposits often create a state …
List of rock types - Wikipedia
The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rocks. Any unique combination of stone composition, mineralogy, stone size, texture, or other distinguishing characteristics can describe a rock type. Additionally, different classification systems exist for each major type of rock. There are three major types of rock: igneous rock, metamorphic rock, and sedimentary rock.
Wikipedia:WikiProject Rocks and minerals - Wikipedia
User:Chris857 - writing and expanding mineral articles; User:Utopes - Will help primarily with the igneous rocks and crystals. Inactive. A.Grace - Amature collector; mav (amateur geologist) Greudin, sporadically. chd, most of the time at the german wikipedia. fiveless Sometimes, when Im not doing something else on Wikipedia.
List of U.S. state minerals, rocks, stones and gemstones ...
51 rows · List of U.S. state minerals, rocks, stones and gemstones ... stone or gemstone Not every …
List of gemstones by species - Wikipedia
There are a number of artificial and lab grown minerals used to produce gemstones. These include: Lab alexandrite. Lab corundum. Cubic zirconia. Lab diamond. Lab emerald. Fordite.
List of rock types - Simple English Wikipedia, the free ...
S Concretion – a concretion is a rock in which a mineral cement fills the spaces between the sediment grains. S Conglomerate – a sedimentary rock composed of large rounded fragments of other rocks. S Coquina – a sedimentary carbonate rock formed by accumulation of abundant shell …
List of minerals - Wikipedia
This is a list of minerals for which there are articles on Wikipedia.. Minerals are distinguished by various stone and physical properties. Differences in stone composition and crystal structure distinguish the various species.Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a ...
Mineralogy - Wikipedia
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts.Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization.
London Hammer - Wikipedia
The London Hammer (also known as the "London Artifact") is a name given to a hammer made of iron and stone that was found in London, Texas in 1936. Part of the hammer is embedded in a limey rock concretion, leading to it being regarded by some as an anomalous artifact, asking how a seemingly man-made tool could come to be encased in a 400 million year old rock.
Thin section - Wikipedia
In optical mineralogy and petrography, a thin section (or petrographic thin section) is a laboratory preparation of a rock, mineral, soil, pottery, bones, or even metal sample for use with a polarizing petrographic microscope, electron microscope and electron microprobe.A thin sliver of rock is cut from the sample with a diamond stone and ground optically flat.
Asteroid mining - Wikipedia
Asteroid mining is the exploitation of raw materials from asteroids and other minor planets, including near-Earth objects.. Hard rock minerals could be mined from an asteroid or a spent comet. Precious metals such as gold, silver, and platinum group metals could be transported back to Earth, while iron group metals and other common ones could be used for construction in space.
Mineral - Simple English Wikipedia, the free encyclopedia
Minerals and rocks Edit. Minerals are different from rocks. A mineral is a stone compound with a given composition and a defined crystal structure. A rock is a mixture of one or several minerals, in varying proportions. A rock has only two of the characteristics minerals have–it is a solid and it …
Rocks and Minerals - Geology (U.S. National Park Service)
Rocks and minerals are all around us! They help us to develop new technologies and are used in our everyday lives. Our use of rocks and minerals includes as building material, cosmetics, cars, roads, and appliances. In order maintain a healthy lifestyle and strengthen the body, humans need to consume minerals …
Rocks and Minerals for Kids | Facts about Rocks | DK Find Out
All rocks contain one or more minerals. Rocks and minerals are mined to help make things around us, from the large stone slabs used in buildings to the tiny pieces of metal in phones and jewelry.
Commons:Featured pictures/Objects/Rocks and minerals ...
Gallery of Rocks and minerals . This page is a gallery of featured pictures that the community has chosen to be highlighted as some of the finest on Commons.