Rocks and Minerals

A rock is formed from minerals; a mineral may be considered as a chemical compoud with a chemical formula. The rock is a mixture. ...

Well, almost everything contains minerals in some way shape or form, but direct minerals would be graphite in a pencil, stone tiles, whatever metals, etc. ...

To meet the definition of a mineral, a substance must be an inorganic, naturally occurring solid, with a set parameter of chemical formulas and a crystalline structure. Non-defining physical properties or characteristics of minerals include: hardness, luster, cleavage, crystal structure, chemical formula, streak, radioactivity, refraction, magnetism, and pleochroism. ...

Loamy soil has a higher clay content, and usually is easier to maintain organic matter content. ...

Six methods to tell minerals apart? 1) Acid test = will it bubble? is there a light, strong, or no reaction to the acid 2) color= white, black, green, pink, or gold 3) streak= black. Brown. White. Red. This tests the powder color of the mineral 4) luster= dull, pearly, shiny 5) weight = gravity test 6) hardness= this is a scratch test mineral against a penny and a file. ...

Pyrite is an iron ore, which has the chemical formula FeS2 (Iron (II) Sulfide) The sulfide ion present is S22- ...

They stick to each other over time

No, far from it. Limestone is actually quite soft, rating only a 3 or 4 on the Mohs scale. Care should be taken when making generalisations about rock properties. Hardness is a function of a material's elastic modulus (how much it deforms under a given load). Limestone (like all rocks) is a natural Earth material. As such it can display a very large variability in properties. For example limestones can have Young's modulus values ranging from 9 to 70 MPa.[A] This is clearly very...

Nothing, except Fe-Iron and S-Sulfur, Pyrite is a sulfide mineral of Iron

the softest rock is talc and the hardest is a diamond

ore

The value of beryl is highly variable. At the bottom would be ore-grade beryl, worth whatever the going rate of beryllium is. At the top would be gem-quality emerald, one of the most precious of all gems, worth thousands of dollars per carat. ...

Precipitates rocks are formed from the simple process of precipitation.

The crystalline mineral amethyst is a variety of quartz and may be found in situ (in place in the rock it was formed in) in small cavities called Vughs mainly in rocks of volcanic origin. This is not very helpful if you want to find them easily. perhaps the best place to find them easily is on the seashore, where amethyst pebbles can often be found where streams have intersected volcanic rocks on their way to the sea and washed down...

Quartz has a high boiling point. This mineral is essentially an oxide of silicon, SiO2, and it boils at over 2200°C. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Quartz melts at normal atmospheric pressure at about 600 OC, which is why high silica content rocks - such as granite, rhyolite, obsidian etc., are highly viscous, whereas basalt which contains NO FREE QUARTZ - all the quartz forms silicates such as olivine, plagioclase feldspar and mica are of a lower viscosity, can flow long distances and freeze at about 1100 OC. ...

the study of cycle of sedimentation and sedimentary rock has great practical value as well. Oil and gas, our most valuable sources of energy are found in these rocks. These precious resources are becoming increasingly difficult to find, and so it's more important than ever to understand how sedimentary rocks which is known as sedimentation cycle. As oil and gas decline in abundance, coal which is a distinct type of sedimentary rock will be use increasingly to generate energy. Another important energy source...

Granite is commonly classified as an igneous rock, one that was formed from cooling magma below the surface of the earth (intrusive). Igneous rock formed from lava erupted at the earth's surface like basalt are called extrusive. Neither of these rocks would be called organic as they were not formed from things that were once alive. Coal could be called organic as it was formed originally from plant material. Chemistry is typically divided into Organic and Inorganic and in this sense, Organic refers...

Where the ocean and land meet is a constant erosion. The beach! My answer: The Grand Canyon is a good example. It used to have a river in it, and over a long period of time erosion and deposition combined to form it :) ...

72%.

Quartz is used in the making of sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry. Quartz crystals are also piezoelectric meaning when an electrical current passes through them they vibrate a small amount. Time can be measured from the vibrations of the quartz crystals so quartz crystals are often used in clocks. ...

A deep narrow steep-sided valley formed by a river in the place where there is little rainfall . ...

Depending to the acid concentration but I'd suppose that it is rather inert to acid. ...

Compactment, Cementation, and Lithification.

A mineral that breaks into relatively straight lines and faces is said to possess cleavage, if it breaks into irregular or curved surfaces, the term is fracture, eg the conchoidal fracture of quartz or obsidian. When minerals break unevenly, there is FRACTURE. Fracture..... the one with the smooth tendency is called cleavage this is called fracture when a mineral breaks into jagged pieces and it is called cleavage when it breaks smoothly ...

nope < they are like snowflakes all one of a kind . i think they are all the same because sedimentary, igneous, and metamorphic rock can change into one another during the rock cycle so yes they are the same ...