Crystal growth environment Most of them are underground, caves, and need a rich source of groundwater. Groundwater contains more saturated cerium oxide. At this time, the pressure is about twice to three times that of atmospheric pressure, and the temperature is 550. Between -600 ° C, and then give the appropriate time, the crystal will crystallize into a hexagonal column crystal according to the natural law of "trigonal system". Generally, in an ideal environment for artificial control, that is, physical and chemical conditions satisfying the above conditions, the growth rate of crystal is about 0.8 mm (mm) per day. This is also the standard production speed of many artificial crystal laboratories and factories. The crystals thus cultivated are so-called "artificial crystals", which are usually cut into chips for use in electronics, computers, and communications industries. Some people call them "cultivated quartz" (cultured quatrtz). It is the use of different nouns, in fact, the same thing. Generally, artificial crystals for industrial use have a thickness of about three centimeters, that is, 30 mm, and take about 40 days to grow; if it is to be used as a crystal ball for grinding in a jewellery industry of ten centimeters (100 mm) or more, usually about It takes 120 to 180 days to be enough. However, this is the most ideal environment under artificial control. It is possible to have this speed. In nature, the situation is not so optimistic, because the conditions of raw materials, water quality, temperature, pressure, etc. are constantly changing. It's hard to get the ideal situation, usually it takes tens of thousands of times, or millions of times, to achieve the same growth. This is also why the "geological age" movement is based on "millions of years" and is also a precious part of "natural crystal". When the normal crystal grows, more growth lines parallel to the cylindrical tip line can be found. Due to the narrow growth space in the ground and caves, especially in the event of an earthquake, or when the earth's crust changes, it is even more likely to be squeezed by other ores, often resulting in different "crystal faces". Also, when the crystal is still in a liquid state, it is often coated with other ores and ash to crystallize, such as rutile (later becomes crystal), volcanic mud (later into phantom crystal) and many more. All of these are "part of nature", please do not regard it as "瑕疵". Cotton Dresses For Girls,Girls Dresses,Girls Cotton Dress,Girls Printed Viscose Dress SHAOXING NEWTEX IMP.&EXP. CO., LTD , https://www.newtexgarment.com.jpg)