Gemstone identification can be an arduous problem, and getting it right is essential for the people in the trade. Recently, electronic gem testers have come on the market that promise to simplify this problem. These are small handheld devices with a small probe that is placed against the gemstone. These devices first entered the market as diamond testers, and helped to solve the problem of distinguishing natural diamond from cubic zirconia (a synthetic diamond simulant). An electronic diamond tester is infact a portable device that we can put in our pocket. The tester has a small, needlelike tip that needs to be probed on the stone under test. If the diamond is real, the device indicates that on its display often with an aural alert. How it Works? Diamond is an extremely good conductor of heat, and this property has been known for a long time …show more content…
A good start is to read its user guide/instruction manual line by line, and make sure you are not doing anything wrong. If your tester works consistently (gives the same reading on the same stone every time) and correctly (accurately identifies stones) then you really don't need to know the principle on which it works. However, if you are having problems then the following basic tips will help to solve most problems. • The probe of the tester must be clean, especially if it hasn't been used for some time. Clean it by rubbing it at right angles on in a circular motion on a piece of white bond paper • Also clean the stoneby wiping it with a clean cloth soaked by alcohol. Alcohol is best because it evaporates quickly and leaves no residue • Place the tester probe on the stone at right angles, and press firmly to make good contact (providing you hold the tip at right angles it won't break). You should get a result in 1 to 3 seconds. If not, remove the probe, wait a few seconds for the stone to cool down and try
When the liquid level is above the calibration line on the pipette, remove the bulb quickly and put your thumb or index finger over the pipette. Carefully “roll” finger to the side and allow the liquid to drop until the meniscus is level with the mark. Then hold the pipette over the flask to receive the liquid and remove the finger. Allow the liquid to drain out.
to get an idea of how I would do my real experiment and what apparatus
Blot up spills immediately using a soft, clean cloth. Avoid rubbing the cloth around as this actually pushes the substance into the marble as well as spreading it in a wider area. Dab, instead, changing cloths as necessary until all of it is gone.
electrophoresis gel and the device was turned on. Using the methods discussed above we found
throw away. Once that is done rinse off the knife you used and either put it in the sink to be
6. Place the test tube in the beaker. Secure the test tube and thermometer to the retort stand using clamps. Begin heating the water bath gently.
It took about two weeks of analysis and observation in order to identify every result of each test. The first part of this process was the Gram stain in order to identify whether if the bacteria was gram positive or gram negative, the primary stain is where the Crystal violet is used since is a small molecule it enter in to the cell wall, after
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
Slogan "A diamond is forever" echoes durability and appeals to the emotional attachment of the owner to the stone.
It’s hard to imagine that a mineral could be fueling wars and funding corrupt governments. This mineral can be smuggled undetected across countries in a coat pocket, then be sold for vast amounts of money. This mineral is used in power tools, parts of x-ray machines, and microchips but mostly jewelry. Once considered the ultimate symbol of love, the diamond has a darker story. "Blood" diamonds or "conflict" diamonds are those mined, polished, or traded in areas of the world where the rule of law does not exist. They often originate in war-torn countries like Liberia, Sierra Leone, Angola, and Côte d'Ivoire were rebels use these gems to fund genocide or other questionable objectives. Even with a system known as the Kimberly process which tracks diamonds to prevent trade of these illicit gems, infractions continue as the process is seriously flawed. The continuation of the blood diamond trade is inhuman, and unethical, and in order to cease this illicit trade further action to redefine a conflict diamond, as well as reform to the diamond certification prosess is nessasary.
You’re browsing along various websites searching for a new piece of jewelry to add to your collection. Suddenly - you see it. The piece that screams your name. It’s an elaborate piece with large cut diamonds and you just know those can’t be real. But they look so real, so you check out the price.
To begin diamonds are can be found all over the world including countries like, Botswana, Canada, Namibia, Russia, South Africa, Australia, and Tanzania. Yet, diamonds are still quite rare and are only found from two dominant deposits. The primary deposits often consist of diamond-bearing “pipes” of volcanic rock called kimberlite. Deep within th...
Being born in the month of July means that one’s birthstone happens to be the pink to blood-red colored gemstone called the Ruby. The word “ruby” comes from yet another word, “ruber” which translates in to red from the dead language of latin, even though this stone is not necessarily always red. Rubies are used most used modernly in jewelry, but are valued by the scientific world through the use of lasers. But July’s birthstone, ruby, has a lot more to what you see physically. From it is chemical formula to it’s environment and how it is formed, rubies have unique characteristics that no other gemstone has.
One morning, a well-known gentleman went into a bank in London, and was received immediately by Mr. Alexander Holder, head of the bank. He asked for a loan of fifty thousand Pounds. Mr. Holder asked him to present collateral to cover that large sum of money; the man showed him a crown that belongs to the country. Knowing the risk, Mr. Holder agreed to lend the gentleman that large sum of money if he pays it back in a few days. After the gentleman left Mr. Holder decided to keep the crown all the time near by him, so he took the crown to his home in Streatham. There he lived with his only son Arthur and his niece Mary who was an orphan. He told them about his story with the crown of diamonds. When the father was going to sleep, Arthur asked for two hundred pounds. He refused to give him thinking his son was spoiled by his rich friends who had nothing to do except watch horses. Before going to sleep, he went to check that all windows and doors were locked. He saw Mary at a side window at the hall. She closed it quickly, and Holder noticed that she looked anxious. After he went to sleep, he heard some noise that woke him up; he waited until he heard it again coming from his sitting room. He jumped out of his bed and saw his son holding the crown broken from the side and three diamonds were missing. In grief, he accused Arthur of being a thief and a liar. Meanwhile Mary came in and seeing the crown fainted. Arthur asked if he could leave for five minutes but Holder refused and called the police to take his only beloved son to jail. The police searched the house but could not find anything and advised Holder to get the help of Mr. Holmes the famous detective.
A Diamond is one of the two natural minerals that are produced from carbon. The other mineral is Graphite. Even though both of these minerals are produced from the same element ,carbon, they have totally different characteristics. One of the most obvious difference is that Diamond is hard and Graphite is soft. The Diamond is considered to be the most hardest substance found in nature. It scores a perfect ten in hardness. Because of its hardness a tiny Diamond is used as a cutting and drilling tool in industry. Even the Greeks called the Diamond “adamas” which means unconquerable. Diamonds also conducts heat better than any other mineral .