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Topic: Diamond enhancement

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	Diamond enhancement - Wikipedia, the free encyclopedia
		Diamond enhancements are specific treatments, performed on natural and sometimes synthetic diamonds (usually those already cut and polished into gems), which are designed to improve the gemological characteristics — and therefore the value — of the stone in one or more ways.
		Because diamond is transparent to the wavelength of the laser beam, a coating of amorphous carbon or other energy-absorbent substance is applied to the surface of the diamond to initiate the drilling process.
		Diamonds treated this way are all Type IIa and owe their marring color to structural defects that arose during crystal growth, known as plastic deformations, rather than to interstitial nitrogen impurities as is the case in most diamonds with brown color.
	en.wikipedia.org /wiki/Diamond_enhancement (2911 words)

	Diamond Glossary
		The polished planes on the surface of a diamond.
		A diamond enhancement process whereby a cavity in a diamond is filled with an artificial substance.
		A diamond enhancement technique whereby a laser is used to drill to an inclusion which is then bleached to enhance the diamond’s appearance.
	diamonds.pricescope.com /glossary.asp (1153 words)

	Leshem : Detecting Clarity Enhanced Diamonds
		Diamond enhancement relates to the sophisticated process that alters the appearance of a diamond, such as lasered, fracture filled, or irradiated.
		Lasered diamond is one that has been laser drilled into the diamond to a dark inclusions.
		Irradiation is a process in which a diamond is exposed to high amounts of radiation, which artificially alters or improves the color of the diamond.
	www.leshem.com /detectingclarity.htm (500 words)

	Diamond Irradiation, HPHT and Clarity Enhancement Services
		Suppliers agree that all diamonds submitted to Prism Gem are from legitimate source and intended to be treated pursuant to the requested process unless explicitly stated.
		Each diamond supplied to Prism Gem by the Supplier shall be accompanied by a detailed written description of the diamond, including but not limited to its carat weight, color, cut, clarity, value (for insurance purpose) and other information as necessary to specifically identify such diamond.
		Clarity enhancement of diamond may be reversed in certain cases and can be done on request for an additional fee if necessary.
	www.prismgem.com /terms.html (994 words)

	FAQ - Loose diamonds, diamond engagement rings, diamond stud earrings and three stone rings at Yehuda diamonds
		The material used for the enhancement is on the molecular level and cannot be measured.
		A: Laser inscription is the process that inscribes the girdle of the diamond (the middle area of the stone) and it is done with a microscopic laser beam.
		Approximately 85-90% of Yehuda Diamonds are not drilled at all.
	www.diamonds-diamond.net /faq.asp (1322 words)

	Diamonds - Yehuda diamond clarity enhancement process for loose diamonds and diamond jewelry
		During the Yehuda clarity enhancement process we insert a microscopic amount of material into the part of the diamond that contains a feather.
		With a Yehuda diamond, the light passes through the natural feather because the material used for the enhancement has the same optical characteristics as the diamond.
		Only if the Yehuda diamond is exposed to high heat or strong acids and bases, the enhancement may be reversed.
	www.yehuda.com /process.asp (588 words)

	Professional Jeweler Archive: Taking the Heat
		Tom Moses of the GIA lab says preliminary tests on a few of the clarity-enhanced diamonds indicate the filler appears to be stable when subjected to normal bench jewelry work, including prong retipping and steam and ultrasonic cleaning.
		While most branded diamonds are laser-inscribed along the girdle, Oved officials say girdle inscriptions can be deceiving – they can be hidden in the setting of a mounted diamond.
		The diamond may have to be rocked back and forth to capture this effect.
	www.professionaljeweler.com /archives/articles/2000/jul00/0700dn1.html (793 words)

	Clarity Enhancement
		In purchasing or selling a diamond, one has to know what properties are attributed to the diamond that makes it either costly or less expensive.
		The clarity enhancement process is a state-of-the-art technology that optically eliminates the fractures and improves the clarity and brilliance of the diamond.
		Diamonds have unique properties which are unmatched by any other substance on the planet.
	www.clarityenhanced-diamonds.com /clarity/enhancement.html (262 words)

	Leshem - Color Enhanced Diamonds
		Color enhanced diamonds are merely natural, polished diamonds treated by a mechanical process known as irradiation.
		The diamond enhancement process affords the jeweler the opportunity to be more expressive by offering a vast array of brilliant color and shades.
		The cost of diamond coloring is relatively low when compared to the alternative, naturally colored diamonds.
	www.leshem.com /coloreddiamonds.htm (207 words)

	New HTHP Diamond Enhancement Revealed
		Because natural green diamonds show radiation lines, the gemological theory always has been they are irradiated in the earth, so treated green diamonds generally are irradiated to replicate the process.
		(Diamonds used in the GE/POL process are mostly Type IIA.) The crystals are embedded in powdered graphite and magnesium oxide and compressed to form a capsule, which is inserted in a pyrophyllite tube and a surrounding coat of soapstone.
		Afterward, the capsule is extracted and the diamond is removed from the capsule.
	www.professionaljeweler.com /archives/news/1999/120299story.html (767 words)

	eBay Guides - Diamond Enhancements
		Diamond enhancements are specific treatments, performed on natural and sometimes synthetic gems (usually those already cut and polished into gems), which are designed to improve the gemological characteristics ?
		this arises from the traditional notion that diamond holds a unique or "sacred" place among the gemstones, and should not be treated too radically, if for no other reason than a fear of damaging consumer confidence.
		The combustibility of diamond has allowed the development of laser drilling techniques which, on a microscopic scale, are able to selectively target and either remove or significantly reduce the visibility of crystal oriron oxide-stained fracture inclusions.
	reviews.ebay.com /Diamond-Enhancements_W0QQugidZ10000000000867834 (785 words)

	Diamond Lab - Gene Therapy
		Viral vectors can be formulated with DS/DOPE to improve targeting to the airway epithelium in vivo and to attenuate vector-induced inflammation through the pharmacological activity of DS.
		"Enhancement of nonviral gene transfer to endothelial cells using lipofection of histone complexed DNA," Tissue Engineering 3, 39 (1997).
		Adenovirus or HA-2 peptide assisted lipofection increases cytoplasmic plasmid in nondividing endothelium with little enhancement of transgene expression.
	www.seas.upenn.edu /~diamond/genetherapy.html (518 words)

	The Many Facets of Diamond "Enhancement"
		In laser drilling a diamond a beam of high energy light is used to bore a small tunnel from the surface of the diamond to the targeted inclusion.
		One concern with all diamond treatments is the permanence of the enhancement.
		Whether you are buying a diamond from a trusted local jeweler, over the Internet, or from a friend "in the business", you should verify that the diamond has not been fractured filled or otherwise treated.
	www.jewelryexpert.com /articles/diamond-enhancements.htm (1407 words)

	aDiamondForYou.com \| About Our Diamonds (Site not responding. Last check: 2007-11-07)
		Diamonds are not as expensive as one may think.
		To the majority of diamond dealers, the terms "investment" and "diamonds" do not belong in the same sentence, unless you intend to hold them for several years and you are a bit of a salesman.
		If you are looking to invest in diamonds, knowing they appreciate slowly, and that you will need to find a buyer at the time of liquidation, then we are the best source for quality diamonds at incredible prices.
	www.adiamondforyou.com /about.shtml (430 words)

	Everything You Always Wanted to Know About Diamond
		Diamond crystallization originates some 200 kilometers, or 320 miles, beneath the surface and the disaggregated crystals are merely transported to the surface via kimberlite and lamproite pipes (Harlow, 1998, p.
		Diamond is the perfect mineral to focus on considering its notoriety and the fact that diamond studies cross disciplines, such as mineralogy, geology, astronomy, material science, mathematics, anthropology, art, history, and economics.
		Diamond imitations abound and an inexpensive alternative to diamond is found in the interesting use of doubly terminated, clear quartz crystals.
	www.emporia.edu /earthsci/amber/go340/diamond.htm (2466 words)

	Gemstones > Gem Enhancement > Diamond (Site not responding. Last check: 2007-11-07)
		Perhaps it is because of this durability that diamond is treasured as a symbol of lasting devotion.
		Diamonds may also be colored in a variety of hues.
		Because HPHT diamonds sell for less than naturally colored diamonds, industry rules require HPHT-treated stones to be identified with an inscription on the girdle of the diamond to prevent misrepresentation.
	www.addmorecolortoyourlife.com /gemstones/gem-enhancement-diamond.asp (328 words)

	Thermal Interface Properties of Carbon Nanotubes on Diamond (Site not responding. Last check: 2007-11-07)
		This heat spreading ability could be useful for thermal interface enhancement in combination with CNTs in that the diamond layer could act to spread the heat to local regions where CNTs bridge interface gaps most effectively.
		Diamond thin films were deposited on a bare silicon wafer surface and then coated with a well anchored CNT array.
		Significant substrate deformation was found to exist in the diamond film, and the resulting contact area at Cu-diamond interface was estimated to be only less than 0.8% of the nominal interface area.
	aiche.confex.com /aiche/2005/techprogram/P29513.HTM (403 words)

	Meyers Jewelers - Our Diamonds
		With our diamond requeset form, you can choose a specific diamond you are looking for and let us know what you need.
		The 4 C's of Diamonds are among the most important characteristics to look for when purchasing a diamond.
		Selecting the right diamond to purchase can be quite a challenge, if you do not know what to look for.
	www.meyersjewelers.com /diamonds (278 words)

	aDiamondForYou.com \| Clarity Enhancement (Site not responding. Last check: 2007-11-07)
		A diamond is chemically formed from a natural grain.
		The process is reversible, meaning that the enhancement could be taken out of the stone by applying direct heat source to the stone.
		To prevent this from happening, when a jeweler is applying fire to the stone in order to thicken the prongs, or for whatever other reason, such as resizing the ring, the jeweler should take the diamond out of its setting first, BEFORE applying the fire to it.
	www.adiamondforyou.com /CE2.shtml (296 words)

	Current Debates and Controversies
		These are (1) the impact of fluorescence in diamonds; (2) the recent introduction of Synthetic Moissanite as a new diamond substitute; (3) the clarity enhancement on diamonds; and (4) the introduction of synthetic diamonds in the market place
		If you are dealing with a diamond of H color or lower fluorescence is normally a plus, and will increase the diamonds beauty and desirability.
		Objection to fluorescent diamond is probably based upon their early association with off color diamonds.
	www.4diamond.com /Debates (2620 words)

	Day's Jewelers
		Diamonds are the hardest and most brilliant of all gems and were once used in medicine because they were believed to produce longevity, energy, strength, and a good complexion.
		When choosing your diamond, it is important to consider the 4 C's (Link to 4 C's section in diamonds).
		There are many terms associated with Diamonds, so to assist you in your search for the perfect Diamond, we have included some of this terminology for you to refer to in our Diamond section (link to diamond section).
	www.daysjewelers.com /coloredstones2.cfm?page=birthstones (2193 words)

	Scott L. Diamond (Site not responding. Last check: 2007-11-07)
		Neutrophil enhancement of fibrin deposition under flow though platelet-independent and platelet-dependent mechanisms.
		J.M. Abrahams, S.L. Diamond, R.W. Hurst, E.L. Zager, M.S. Grady.
		J. Wu and S. Diamond, "A Fluorescence Quench and Dequench Assay for Fibrinogen Polymerization, Fibrinogenolysis, or Fibrinolysis." Analytical Biochem.
	www.uphs.upenn.edu /ime/diamond.shtml (1490 words)

	Blue Diamonds pricesl: Buy Wholesale International Diamond Center (Site not responding. Last check: 2007-11-07)
		We guarantee that all our diamonds are conflict-free, purchased from legitimate sources not involved in funding conflict in compliance with United Nations Resolutions.
		The International Grading Institute helped us send the diamonds to a well respected diamond enhancement laboratory in New York to acquire a color closer to the color for which we choose the diamond.
		When we received back the diamonds, their color had turned blue with a green flavor, very exquisite.
	www.ajediam.com /blue_diamonds.html (1001 words)

	All Diamond Specs
		The term Carat is more than often confused with the size of the diamond but it actually refers to the wieght of the Diamond itself.
		Since larger diamonds are found less frequently in nature and are thus rarer, their cost will reflect that.
		When describing diamond earrings for sale, it is usual to advertise the TOTAL weight (carat) in the earrings.
	www.abazias.com /education/news/Other/All_Diamond_Specs.asp (263 words)

	UPenn - CBE - S. L. Diamond
		Schmidtke and S. Diamond, "High resolution imaging of membrane tethers formed during neutrophil attachment to adherent platelets of P-selectin in physiological shear flow," J.
		Laurenzi and S. Diamond, "Monte Carlo simulation of the heterotypic aggregation kinetics of platelets and neutrophils," Biophysical J. Tandon and S. Diamond.
		Diamond and S. Anand, "Inner Clot Diffusion and Permeation During Fibrinolysis," Biophysical J. Sharefkin, S. Diamond, S. Eskin, C. Dieffenbach, and L. McIntire, "Fluid Flow Decreases Endothelin mRNA Levels and Suppresses Endothelin Peptide Release in Human Endothelial Cells," J.
	www.seas.upenn.edu /cbe/diamond.html (1569 words)

	Audio Restoration vs. Enhancement Overview - Diamond Cut User Forum
		In my experience as an amateur, the line between "restoration" and "enhancement" is a thin one.
		So, the frame rate could be looked at as occuring at 62.5 mSec intervals with the frequency resolution being determined by the number of hairs in the cochlea.
		The ear is more than a "microphone" style transducer, but it also converts the audio signal into thousands of parallel paths which are sent to the brain.
	www.diamondcut.com /vforum/showthread.php?t=1273 (1307 words)

	Diamonds.net News - Briza Adds New Flavor to Color Enhanced Diamond Choices
		The high pressure narrows the spaces in the diamond crystal, which acts as a filter for a beam of light comprised of all the colors of the rainbow.
		Some colors from the spectrum are absorbed by the diamond, and only one color is reflected back.
		Each diamond shape and size demands its own level of treatment.Â High pressure, high temperature (HPHT) process uses extremes, which is why that processÂ is notÂ in controlÂ of the final color, said Barak.
	www.diamonds.net /news/NewsItem.aspx?ArticleID=15933 (790 words)

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