miércoles, 20 de mayo de 2009

importance of mineral resources



Minerals are really important in our daily life. You may not have known but in most of the food we eat we can find minerals such as:Calcium, iron, magnesium, copper, and zinc. It is necessary to eat this so we can have strong bones and to be able to grow big and healthy. Minerals aren't only found in food, they can also be found in medicines such as kalinite which is found in acid- neutralizing medicines and sulfur which is found in different kinds of medicines.


Many things we use every day are minerals such as quartz that is found in glass, and in electronics such as timepieces. Calcite that is found in chalk and marble building material. One common mineral is Halite which is used in table salt, food preservatives, and road safety when there is ice on the roads. Graphite is found in pencils, dry lubricant. Who would have known that almost everything we use daily contain minerals.

Gemstones are hard, colorful minerals that are very rare or hard to find. Gemstones are usually used in jewelry since they are beautiful. Examples of these minerals can be found as the most expensive such as gold, and diamonds. jewelry, pottery, medicine, pencils, minerals can be found anywhere even in places you could have not suspected.

lunes, 18 de mayo de 2009

minerals properties


Minerals have many properties such as its luster, streak, color, hardness, crystal system, density, cleavage, and fracture. Each one will help you identify which type of mineral it is. Luster is the light that the mineral reflects from its surface and examples of luster are: glassy, metallic, silky, pearly, greasy, waxy, earthy,and dull or submetallic. The color of the mineral is easy to find but it isn't that helpful to identify a rock since there can be many minerals with the same color. Another reason why it might no be helpful is because the same mineral can have different colors and when trying to identify you might get confused.


The streak of the mineral is the color of the powder. You can scratch the mineral with a white porcelain tile or if it is a light streak you can use a dark tile. Usually the color of the streak is different form the color of the mineral. Like biotite that is black and has a white streak and pyrite that is gold and has a black streak. A mineral can have different colors but the streak will always be the same for the mineral.


Hardness and field test is another good example for helping you identify what type of mineral it is. depending on which number it is in the MOHS scale it will tell you how hard it is. Like if it is ranked number one it could be talk because when it is scratched by a fingernail flakes come out. In this scale the lowest number means it is softer or the higher it is the harder it will be. For instance a diamond would be ranked 10 since it can only be scratched by another diamond.



density is the mass of a given space; and that's another property of the mineral. density varies depending from which material it was made, but the size has nothing to do. To find the density you will first have to find the volume and then divide it by the mass. The crystal system will help you identify which type of crystals it has depending on the number of sizes and the degrees of the angles. Last but not least is cleavage and fracture. They will be determined on how the mineral breaks. For example, is the mineral breaks up evenly and easily then it would have a cleavage, and if it doesn't break easily and it has rough surface then it has a fracture.