What is the meaning of calcite?
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Calcite is the name for the mineral consisting of a form of CaCO3. It is the main constituent of limestone, a common sedimentary rock formed from the shells of creatures in ancient seabeds.
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Actually there are many important and major exceptions to the examples already provided here. While it is true that many minerals form either by crystallization from a molten state, or by crystallization from solution, there are several other important methods of mineral formation. \n\nMetamorphism is the solid state change of molecular arrangement that forms many minerals without melting or dissolution. A common group of minerals often formed by metamorphism, which is the result of high (but not high enough to liquify) temperatures and/or high pressures are garnets. Other examples are  muscovite, sillimanite, biotite, kyanite, and many more.\n\nAnother example of a change in mineral composition that does not involve either dissolution or melting is the common change of anhydrite to gypsum by hydration. Anhydrite contains only CaSO4, and when H2O is chemically combined (hydrated) with anhydrite it becomes gypsum. The process can be reversed releasing the water by a change in pressure.  There are a large number of minerals that are found either in a hydrated state (chemically combined with H2O) or in a dehydrated state. Many clay minerals will change composition under pressure and heat without melting or being dissolved in water. \n\nOther minerals that are an important group are what are known as polymorphs. Polymorphs are minerals that share the same chemical composition, but have varied molecular structure. A good example of a polymorph is calcite and aragonite. Aragonite has the same chemical composition of calcite (CaCO3), but is unstable at low temperature and pressure. At a temperature of 400 degrees C, with no change in pressure, aragonite will spontaneously alter to calcite. No melting or dissolution is involved. \n\nHere's a reference for calcite/aragonite:\nhttp://www.galleries.com/minerals/carbonat/aragonit/aragonit.htm\n\nSome minerals (as in rocks) even form by biogenic processes, however the generally accepted definition of a mineral (Nickel, 1995, Canadian Mineralogist) excludes most of these from being true minerals. While these 'biominerals' may involve precipitation of the mineral from solution, the process is not straightforward precipitation as it involves a living organism. One common example is the calcite which is deposited by molluscs as part of their shells (some deposit aragonite) and many other organisms. Many bacteria play an important role in creating some biominerals. Some ore deposits of zinc sulfides are deposited by bacterial activity. See: http://www.sciencenews.org/articles/20031115/bob9.asp\nSome commercially important iron ore deposits such as banded iron formations, were deposited by the activity of cyanobacteria and contain several iron minerals. You could argue that this was simply a precipitate from a solution, but the cyanobacteria played an important role in adding the oxygen to the water that caused the iron to precipitate out. Your teeth are another example of a biogenically deposited "biomineral". Your teeth contain hydroxy apatite. Another interesting example is the biomineral equivalent of atacamite that is found in the teeth of bloodworms. This copper mineral is quite rare and the type locality for the non-biogenically formed mineral is the driest desert in the world, the Atacama of northern Chile.\nhttp://webmineral.com/data/Atacamite.shtml \nHere is the article about the bloodworm teeth:\nhttp://www.sciencenews.org/articles/20021109/note14.asp\n\nTwo other minerals that have an interesting method of formation are coesite and stishovite. These are rare dense forms of SiO2 (polymorphs of quartz) that are only found in meteorite impact craters and rarely in the kimberlite pipes where diamonds are found. These two polymorphs of quartz are formed under about 20 kilobars of pressure or more during a meteorite impact. It is hard to say if they undergo a molten state, but because they are metastable, it seems unlikely to me that they would have formed and retaine
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Actually, Calcium in it's pure form doesn't exist in nature, as it is highly reactive with water.  It is only found in compounds such as chalk (CaCO3), lime (Ca(OH)2) or gypsum (CaSO4), which can erode to very fine particles which then become SUSPENDED in water.
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A mineral is a solid, (generally) inorganic compound with a definite chemical composition and organized structure.  So, liquid water, not being a solid with a structure, would not be a mineral.  Ice, however, is technically a mineral.  (When it occurs in nature--sometimes the boundaries of our definitions are so arbitrary!)
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xenolith\n\nA piece of foriegn rock enclosed within an igneous rock. The foriegn rock is usually picked up from the walls surrounding the igneous rock and is frozen in place before it has a chance to melt. (=inclusion)
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sand stone, is a type of sediment rock,quartz conglomerate,shelly limestone,oil shale,coal,rock fragments that result from weathering may be transported by glacilar movements wind waves or current,this debris,is deposited at a new location,as a sediment.
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Just calcium I think... chlorine, cobolt, copper are not and carbon by itselft should be either...
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http://en.wikipedia.org/wiki/Calcium
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It is the other way around. Calcium atoms ARE present in bones.
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In geochemistry, a trace element is a chemical element whose concentration is less than 1000 ppm or 0.1% of a rocks composition.
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Many minerals glow or fluoresce under different sorts of light. \n\nCertain types of calcite will glow under ultraviolet light. \nYou need to do a google search on FLUORESCENT MINERALS and all will then be revealed. \n\nHope this helps.
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I think you are supposed to make them up. How about Calcite is a mineral that is hard to beat.
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Limestone is made of Calcium Carbonate (mostly) which is basic. \n\nMost acid soils contain sulfuric acid H2SO4.\n\nAcids + bases = neutralized.\n\nThe sulfuric acid reacts with the limestone in a neutralization reaction.\n\nLimestone: CaCO3 + H2SO4 --> CaSO4 + H2CO3\n\nThe calcium sulfate (CaSO4) is soluble in water and hence the limestone dissolves and crumbles.\n\nH2CO3 --> CO2 gas + H2O\n\nGet an "A".
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oxidation of the calcium in the shell
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The best answer is C. Minerals are inorganic, have a definite homogeneous chemical structure, are solid and have a crystalline structure formed by geologic processes.
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Tooth enamel is the hardest and most mineralized substance of the body. It is the normally visible dental tissue of a tooth. Enamel's primary mineral is hydroxyapatite, which is a crystalline calcium phosphate. The large amount of minerals in enamel accounts not only for its strength but also for its brittleness. \n\nThe eggshell is approximately 95% calcium carbonate crystals, which are stabilized by a protein matrix. Without the protein, the crystal structure would be too brittle to keep its form. \n\nThus both eggshells and teeth have crystalline calcium carbonate!
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* rock - mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable quantities in nature, as by the action of heat or water. \n* Igneous rock - rock formed by the solidification of molten magma\n* metamorphic rock - rock altered by pressure and heat\n* sedimentary rock - rock formed from consolidated clay sediments