Description

Quartz crystals are used as wave carriers for radios and televisions. Most of the wall clocks and voltage exerted on the quartz crystal slice make this chip expand and contract. This causes the oscillations to occur at a regular rate. The size of the chip determines the number of oscillations per second and turns the oscillations into seconds, minutes and hours. .

Quartz does not expand greatly when heated, and it does not crack when it is cooled quickly. These properties make it an important material in the manufacture of glass containers that can withstand the high temperatures and rock crystals usually use in the manufacture of lenses for some telescopes and microscopes. Most of the quartz crystals used for industrial purposes are artificially produced due to the limited supply of natural crystals. Sandstone is a familiar material of building materials. Quartz sand is used for making sandpaper and is very important in the glass industry.

It is an aluminum silicate containing potassium, sodium or calcium. For the industry there are two main types of Feldspar: one is called Potassium feldspar (Orthoclase) with potassium oxide of ***3%. The other type is known as sodium feldspar, and its sodium oxide is ***2%. Feldspar is a group of mineral salts that have a similar structure. Feldspars rocks form *0% of the earths crust. They are a large group, but there are *0 known elements among them, but there are 9 elements that are very famous. The highest percentage of them have a specific gravity of 6.5. Feldspar is one of the three metals produced by the chemical decomposition of granite; it has a low resistance under carbonic acid which can be found in the acidic rains , this process take place by the effect of hydrogen ion which ejects a part of the silica, potassium and sodium that is transforming to kaolin.
 
Uses:
Feldspar ore is used in several industries, such as glass and ceramic industry. It is also used as an effective paste in the paints, plastics, rubber and porcelain.