What You Need to Know about Career TrainingWritten by Virginia Bola, PsyD
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5. Visit placement office and find out what services and support are offered. At a minimum, you should receive a professional resume and multiple job leads. An excellent school will also provide interviewing skill training and employer background information. Find out if school works consistently with several local employers which indicates that their graduates have been positive hires in past.
6. Sit down with Sunday Classifieds and circle employers in field. Then call them for information. Are new graduates considered or is actual work experience required? Is school known in business community and what kind of reputation does it have? Has this company ever hired a graduate of this school? How would employer recommend that someone enter this field?
If school comes through with flying colors, move ahead with knowledge that obtaining a first job after training is always difficult but you have some sources of support.
If your questions have revealed weaknesses in program, evaluate other schools or consider selecting a different career goal.
Virginia Bola operated a rehabilitation company for 20 years, developing innovative job search techniques for disabled workers, while serving as a respected Vocational Expert in Administrative, Civil and Workers' Compensation Courts. Author of an interactive and emotionally supportive workbook, The Wolf at the Door: An Unemployment Survival Manual, and a monthly ezine, The Worker's Edge, she can be reached at http://www.unemploymentblues.com
GemologyWritten by Alain Darbellay GGGems
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other things of methylene iodide which shows an index of refraction of 1.81 (this liquid is toxic) Dichroscope of which principal part is made up of a tube comprising a window with one of ends and a lens with other, between two is assembled a piece of calcite, chosen because of its strong double refraction so that two images of window appear side by side to observer which looks in eye-glass. The light of adjacent images of window vibrates in two perpendicular plans one to other at a rate of one only plan for each image. The rotation of stone is a significant factor during control of dichroism, bus in all double refraction stones, it exists one or two directions of unirefringence, known as optical axe. The Chelsea color filter. There is a very effective means to reveal subjacent differences in color, it is use of colored filters. They are especially effective in differentiation of natural and synthetic emerald. The optical fiber lamp is useful to distinguish inclusions in rough stones. Microscopes: binocular one, i.e. to double objective is best adapted for gemology. The microscope is of first importance in detection of counterfeits. Indeed, study of inclusions which stone can contain is a practical means to identify gems while explaining to a certain extent conditions under which they were formed in nature. The spectroscope concerns an extremely simple method which allow identification of all stones; rough or polished not being able to be seen with refractometer and which even makes it possible to distinguish certain synthetic or glasses. This method makes it possible to analyze nature of dye of stone. The way in which spectroscope analyzes various wavelengths of light is in theory very simple; that depends on different degree of refraction to which its subjected various rays of each color (wavelength) when they are propagated through a prism of glass or another transparent substance. After having passed through a prism, a narrow parallel beam of white light is spread out in a ribbon with colors of rainbow, visible spectrum. Let us note that a powerful instrument used in many fields of science is at disposal of gemologists, it is microscope of Raman which spectroscopy supplements traditional technology of laboratory. This instrument can give information on samples lower than 1µm what is not accessible to any technique. The use of Raman spectroscopy by imagery is single in order to determine in a nondestructive way molecular composition of inclusions present in gems. Analyze by fluorescence: four kinds of radiation are used. The first consists simply in passing a powerful luminous ray of a lamp of projection of 500W through a balloon filled with a strong copper sulfate solution, this last absorbs all red light, orange and yellow and filter rays are invisible if one observes through a good red or orange filter. If a substance only lit by beam of blue light in which it is shines while being observed through one of these filters, it emits a fluorescence. The second method of stimulation of fluorescence is used, it uses a lamp with high pressure out of quartz, and whose light is filtered through glass of Wood.
The third uses ultraviolet radiations of short radiation emitted by a quartz-mercury lamp with low pressure, in which mercury line with 2537 Å is dominating.
X-rays represent fourth source of radiation, they are dangerous unless source is not seriously armored. The unit weight and its measurement. It frequently occurs that only an approximate value of density of a stone is necessary to differentiate between gems from similar appearance; in this case a control from density can be carried out by means of liquors of density. The principle of method is simple. A stone will be inserted in a less dense liquid, will float in a denser fluid and will remains in suspension in a liquid of equal density. The three liquids are: The bromoforme density 2,9. The methylene iodide density 3,33. The liquor of Clerici density 4,15. PRINCIPAL COLORING ELEMENTS IN THE GEMS. Chromium Ruby, Emerald, Pyrope garnet, grossularite and uvarovite, Tourmaline. Copper Dioptase, Malachite, Azurite. Iron Sapphire, Aquamarine, Citrine, Almandin garnet. Manganese Morganite, Pink tourmaline, Spessartite garnet. Nickel Chrysoprase. Titanium Blue Sapphire. Vanadium Green beryl, Blue zoïsite , Garnet. GGGEMS.COM
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Cutting Styles ¦ Fancy Cutting ¦ Characteristics ¦ Crystalline Systems ¦ Size & Weight