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Topic: Brilliant cut

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	Brilliant (diamond cut) - Wikipedia, the free encyclopedia
		Brilliant is one of the most used cuts for diamonds.
		The round brilliant cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal.
		The brilliant cut was introduced in the middle of the 17th century.
	en.wikipedia.org /wiki/Brilliant_(diamond_cut) (1137 words)

	Brilliant Cut Diamonds
		The brilliant cut for diamonds was invented or perfected over 60 years ago, and is quite simply the best cut for most diamonds, and the most popular.
		The technical reasons why a brilliant cut diamond is usually the best depend on the behaviour of light when it is reflected or refracted at junctions between the media it is travelling through.
		Most oval, pear, marquise, and heart shaped diamonds are variations on the brilliant cut, in which case their facet names remain the same as for round brilliant cuts.
	www.24carat.co.uk /brilliantcutdiamonds.html (547 words)

	Diamonds and engagement ring guide (Site not responding. Last check: 2007-10-12)
		Cut is by far the most confusing of the 4 Cs, since it can refer to the cutting style, the shape of the stone (round, square, heart-shaped, etc.), its proportions, or the workmanship of the actual diamond-cutting process.
		You may also hear of hybrids of the two basic cuts, such as the emerald cut, or you may also encounter some of the older-style cuts, such as the rose cut, the old European cut, or the old mine cut.
		The brilliant cut has triangular facets that surround the stone and usually culminate on a flat top called a table.
	www.diamondreview.com /tutor/4cs/tutor_4cs_cut.shtml (525 words)

	Princess cut diamonds. Square brilliant princess cut diamonds.
		A "Princess Cut Diamond" is a square brilliant cut diamond with sharp, uncut corners.
		Princess cut diamonds routinely sell for less than a round brilliant cut diamond of comparable characteristics because the cutting process yields finished stones which weight sixty to sixty two percent of the diamond rough that the stone is being cut from.
		However, we would have to produce a shallower princess cut diamond than we feel is necessary to deliver the light return that the cut is actually capable of and we prefer to cut for performance as opposed to a paper rating...
	www.niceice.com /princess_cut_diamonds.htm (556 words)

	Diamond Cut
		A diamond’s cut refers to the way light is reflected from one facet to another and then dispersed through the stone and back to the eye.
		A well cut oval diamond can be almost as bright as an ideal cut round, as the angles for cutting are similar to that of a brilliant cut diamond.
		Sometimes referred to as a "pillow cut", the cushion cut has an open culet (the bottom of the diamond) and a rectangular to square shape with rounded corners.
	www.amgad.com /cut.asp (626 words)

	Ida's Gems - Diamonds Cut
		Cut is the characteristic of a diamond that gives it the fire, scintillation, and brilliance that diamonds are known for.
		When a diamond is cut to the ideal proporations, all of the light entering from any direction is totally relfected through the top and is dispersed into a display of sparkling flasehes and rainbow colors.
		Typical fine cut diamonds, which are not exactly ideal in make but are very lively and brilliant, are in the range of #1 to #4 with a slightly spread table.
	www.idasgems.com /diamonds/cut.html (462 words)

	Diamond Cut: Diamond Source of Virginia Loose Diamonds Education
		Cut has the biggest impact on the beauty of diamonds and sometimes least amount of difference in their price compared to color, clarity and carat weight.
		The cut of a diamond does not just mean its shape (round brilliant, princess, oval, cushion, etc.) but also addresses the symmetry, polishing, angles and the proportions of each physical aspect of the diamond.
		The typical brilliant cut diamond is cut with 58 facets, 33 on the crown and 25 on the pavilion.
	www.diamondsourceva.com /Education/Cut/Cut.asp (2670 words)

	Emerald Cut Diamonds
		This was a simple cut used by the earliest jewellers for many gemstones including emeralds and diamonds, because it is relatively easy to cut, especially with the limited tools and technology available until recently.
		It is our strongly held opinion that more modern cuts such as princess, and more particularly radiant cuts produce far more attractive diamonds than older cuts such as the step cut, and therefore the emerald cut.
		Most oval, pear, marquise, and heart shaped diamonds are variations on the modern round brilliant cut, and the princess cut and radiant cut are also rectangular or octagonal shapes cut with a modification of the principles used for brilliant cuts.
	www.24carat.co.uk /emeraldcutdiamonds.html (666 words)

	Articles & Information (Site not responding. Last check: 2007-10-12)
		Cutting facets into lead glass, in the same way one facets a diamond, enhances the brilliant sparkle of the glass by creating more angled surfaces, allowing multiple reflections and refractions.
		Cut glass was traditionally polished with wooden wheels (now acid polished) to remove the gray, "matte" surface left after cutting.
		To cut a piece of glass, the cutter held the thick, heavy blank up to the wet, spinning cutting wheel (which was rotating with a downward motion), and looked through the blank while cutting accurately.
	www.brilliantglass.com /store/condition2.aspx (1461 words)

	PGR Gems & Minerals Diamond Basics ~ Diamond Cut Information
		Cut height is (in my opinion) the most important factor in a diamond's brilliance.
		These cuts do not require the use of a diamond saw in fabrication, so until that piece of equipment was perfected, these were the standards in diamond cutting.
		These cuts follow the original shape of the rough, and are therefore usually heavy and deep and may have poor symmetry.
	www.pgrgem.com /diamond/cut.htm (1343 words)

	Facet Shoppe Gemstones for Sale: Citrine, Diamonds, Diopside, Emeralds, Garnets, Tsavorite, Umbalite, Spessartite, ...
		It is cut in a round brilliant, and is 3.9 mm, weighs.25 cts.
		It is cut in a 5.7 mm round brilliant, and weighs.88 cts.
		The cut is a trilliant variation, 11 mm and 5.35 ct. John is the cutter.
	www.gemcutter.com /cut02.htm (2318 words)

	MSU Diamond Cut Study
		At the moment, we confine ourselves to studying the round brilliant cut of diamonds for the purpose of finding the best tradeoff in the simultaneous optimization of the light return, fire, and weight of a diamond.
		The Microanalysis involves the detailed studies of the narrow range of cut parameters: the crown angle - from 30 to 40°, the pavilion angle - from 38 to 43°, and the table size - from 52 to 60%.
		By cutting the diamond using these parameters as a guideline, it is possible to improve the appearance of the diamond without breaking conventional proportions.
	www.gemology.addr.com /cut/english/_index.htm (519 words)

	Flanders Brilliant Cut Diamonds, Flanders Belgium
		The Flanders Brilliant Cut Diamond is an excellent alternative for somebody that likes the look of a square brilliant cut diamond such as a Radiant or Princess, but who wants the visual performance and light return offered by our round brilliant ideal cut diamonds.
		This is because the cutter actually uses the same diamond rough to produce the F.B.C.D. that is used to produce a round brilliant cut diamond instead of the diamond rough used to produce a princess or radiant cut diamond...
		Most square brilliant cut diamonds 'flatten out' when viewed from an angle, but the symmetry of the Flanders Brilliant keeps the light bouncing around even when the diamond is tilted...
	www.niceice.com /flanders_brilliant_cut_diamonds.htm (499 words)

	GIA \| On Diamond Cut
		To predict a cut grade for a round brilliant cut diamond, GIA Facetware™ requires the input of the following proportions: total depth, table size, crown angle, pavilion angle, star length, lower-half (lower-girdle facet) length, girdle thickness, and culet size, as well as the diamond's polish and symmetry grades.
		Predicted cut grades for diamonds with proportions or parameters outside these ranges are not available; in most cases these diamonds would receive the lowest cut grade in the system.
		Although GIA Facetware™ provides estimated cut grades based on all of the proportions and finish assessments of a standard round brilliant diamond, there are three main areas of grading that can be considered before using GIA Facetware™ to estimate the potential cut grade.
	www.diamondcut.gia.edu /06_estimating_a_cut_grade.html (950 words)

	Modified Brilliant Cut Diamond
		While the round brilliant is not considered a Fancy cut, there are quite a few Fancy shapes that are the result of the brilliant cut, and these are put under the sub category of 'modified brilliant'.
		The brilliant cut is marked by the 58-facet form.
		It has variations in bezel facet length (which are longer in the early modern brilliant cut than the later modern brilliant cut) and position of the pavilion main facets (extending longer in the later modern brilliants than in the early modern brilliants).
	www.abazias.com /DiamondEducationPF/Modified_Brilliant_Cut_Basic.asp (224 words)

	Development of the Round Brilliant
		The round brilliant shape finds its origins in the single cut type of diamond, which had a broad table with 8 facets on the crown, and 8 facets on the pavilion.
		It due to his studies with the brilliant cut that Marcel Tolkowsky was able to formulate the mathematical models for the ideal cut round brilliant shape.
		Ideal cut round brilliants are far more labor intensive than other round brilliants and this is due to the greater exactitude required of the diamond cutter during all phases of the diamond shaping.
	www.abazias.com /DiamondEducationPF/The_Round_Brilliant_Advanced.asp (414 words)

	American Brilliant" Cut Glass Tray (Site not responding. Last check: 2007-10-12)
		Description: American Brilliant" cut glass tray Diameter 14" X 9" This "American Brilliant" cut glass tray designed with curved miter splits which separate the elements of the pattern.
		On the two sides of the tray are fields of deep miter cuts forming diamonds.
		Stems with leaves made of deep miter cuts and matte flowers form the pattern on the ends of the tray.
	www.goantiques.com /detail,american-brilliant-cut,711817.html (158 words)

	Welcome to Tradeshop Fine Jewelers
		Only The round brilliant cut is really designed to provide maximum optics for the brilliance and scintillation, making the light seem to sparkle and dance in the light.
		The AGS defines "Ideal Cut" as a range of Table diameters between 53-57%, Crown Angles at 34-35%, Crown Height at 15-16.5%, Girdle Thickness at Thin to Medium, Pavilion Angle of 41% with the Pavilion depth at 43-43.5%...
		Stones with deeper cuts, or larger tables will be discounted, but you can be sure that if you confirm to a narrow range of specs we've discussed here that you will do very well.
	www.tradeshop.com /master/cut.shtml (2194 words)

	Diamond Cut Information
		An excessively deeply cut stone will also affect the way the light passes and reflected in the mass of the diamond.
		The most common, and most "brilliant", diamond cut is the Brilliant Cut, a.k.a.
		This effect is eliminated by paying attention to the depth (want lower sixties) and the crown height (want close to 14%) The light passes through the back of the stone due to the criticality of the angles needed to reflect the stone being too steep.
	www.tradeshop.com /diamond/cut.shtml (1273 words)

	American Brilliant and Cut Glass at Our Olde Stuff Antiques and Collectibles
		It is difficult to detect due to deep cutting on the rim and does not affect the display of it.
		The bottom half of the nappy has 2 etched intaglio or wheel cut daisy flowers with leaves and 2 hobnails surrounded by nailheads (pointed diamonds) inside a figure 8 miter, also known as a 2 pointed loop miter cut.
		The stem has a large diamond cut facet that continues with smaller faceted concave cuts as it drops to base.
	www.tias.com /7815/InventoryPage/1445347/1.html (1235 words)

	Facet Shoppe Gemstones for Sale: amethyst, ametrine, andalusite, apatite, aquamarine, beryl, benitoite, chrysoberyl.
		This one is cut in a square cushion and is 16.93 cts and 16.1 mm.
		It is a brilliant Octagon cut, 8.2 mm, and 2.33 cts.
		B-526-MORG: Morganite this one was cut by John in a cut corner square Barion design, and it is an eye-clean stone, with a couple of minor inclusions visible under magnification.
	www.gemcutter.com /cut01.htm (1780 words)

	Diamond cut - Wikipedia, the free encyclopedia
		(That is no longer true as cutting and polishing technology has improved.) This is because a full-cut brilliant of such small size would appear milky to the human eye, owing to its inability to resolve the stone's dispersive fire.
		Another beautiful cut is the Flanders cut, a modified square with cut corners, brilliant facets and is currently being cut by cutters at Russian Star.
		This is because some certificates will not show the important measurements influencing cut (such as the pavilion angle and crown angle) and will not provide a subjective ranking of how good the cut was.
	en.wikipedia.org /wiki/Diamond_cut (4830 words)

	GIA's Brilliant Diamond Cut Study
		The first part of the Gemological Institute of America's long-awaited analysis of diamond cut confirms the long-held belief there is no one Ideal cut – at least where brilliance is concerned.
		It then entered eight cut factors (crown angle, pavilion angle, table size, culet size, star length, lower girdle length, girdle thickness and girdle facets) and several physical factors that also affect the way light interacts with a diamond.
		The GIA researchers concluded from their findings that "the relationship between brilliance and the three primary proportion parameters [crown angle, pavilion angle and table size] is complex..." The way these factors interact with each other can affect brilliance in sometimes unexpected ways.
	www.professionaljeweler.com /archives/articles/1999/jan99/0199dg.html (910 words)

	DiamondRing.com Diamond Tutorial Learn about Shapes: Round Brilliant Cut (Site not responding. Last check: 2007-10-12)
		It is also the most brilliant of all the cuts.
		Cutting to "Ideal" generally entails losing more weight from the rough diamond than regular proportions.
		There are 58 facets in a Round Brilliant Cut including the culet.
	www.diamondgrading.com /Shapes_Round.html (320 words)

	Brilliant Cut Diamonds..
		There are many ideal cuts or sets of proportions and facet angles for the round brilliant cut.
		It can be seen therefore that a ratio can be realised for any given brilliant cut diamond, and which when calculated, will yield its deviation from the 100% brilliance of the Eulitz Cut (mathematically perfect).
		The 'Ideal' round brilliant cut has changed through out history, but in 1972 Euliz calculated the proportions necessary for 100% brilliance in a diamond.
	www.jewellerycatalogue.co.uk /diamonds/round-brilliant.htm (203 words)

	Round Brilliant Cut antique diamond engagement and wedding rings, Art Deco Diamonds. (Site not responding. Last check: 2007-10-12)
		The process in cutting the Round Brilliant Cut Diamond is a big improvement over the previous steps that used to be used to cut diamonds.
		In the early 1900's, Marcel Tolkowsky, calculated the cuts necessary to create the ideal diamond shape, which is now know as the Round Brilliant Cut.
		AGS defines " Ideal Cut" as a range of Table diameters between 53-57%, Crown Angles at 34-35%, Crown Height at 15-16.5%, Girdle Thickness at Thin to Medium, Pavilion Angle of 41% with the Pavilion depth at 43-43.5%.
	www.artdecodiamonds.com /RoundBrilliantCut.html (382 words)

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