Quartz crystals are grown and manufactured using an autoclave. The process creates hydrothermal quartz, which are also known as cultured or synthetic quartz.Know More
Synthetic gemstones have been grown and manufactured since the late 19th century. Such man-made crystals have had industrial purposes:
Man-made crystals are also used for jewelry. Man-made stones are not as rare as natural gems, but can be made in similar size, clarity and color. Because of the possibility of fraud, the United States Federal Trade Commission requires synthetic gems and crystals to have descriptions that clearly identify them so they are not mistaken for natural ones.
Grown or manufactured quartz crystal is also known as hydrothermal, cultured or synthetic quartz. It is created inside an autoclave, a specialized piece of equipment that produces high levels of internal pressure and heat. To grow quartz, the autoclave must produce 21,000 pounds per square inch of internal pressure and temperatures above 200 degrees Celsius.
Crushed silicon dioxide, known as silica, is placed in the autoclave and serves as the source material for the quartz crystals. The process requires water and slices of quartz as well, which are placed in the autoclave as a place for the synthetic crystals to grow. As the autoclave is heated, the temperature increases, and changes begin to occur.
First, the water becomes steam and dissolves the crushed silica. Second, the steam rises and carries the dissolved silica to the top, where it attaches to the quartz and begins to grow as new crystals.Learn more about Earth Science
Water used in homes and other structures either goes into a septic tank underground or through a sewer system and then into a sewage treatment plant. Water that ends up in sewage treatment plants is treated according to the type of water that it is, while water that is leaving the plant must meet specific quality requirements and may receive other treatments.Full Answer >
An earth tremor is another term for an earthquake, although it is most commonly used to describe earthquakes of low intensity. Earthquakes are measured with tools called seismographs, and their intensity is rated on a logarithmic scale, called the Richter scale. The Richter scale is not useful for earthquakes that rank higher than a level 8 earthquake.Full Answer >
The Encyclopedia of Arkansas explains that commercial mining of quartz is rare and occasionally consists of the use of explosives to first expose the quartz, followed by the operation of small hand tools such as chisels and rock picks to extract portions of the mineral from a quarry. Quartz is quite sensitive to temperature changes, so miners prefer not to use explosives unless absolutely necessary.Full Answer >
An autoclave is a piece of equipment that is used to sterilize instruments. It uses steam under high pressure to remove any contaminants or bacteria.Full Answer >