Diamond Color Grading @ Jewel Info 4 U
By: Ms Nandita Ray
Color Grading For Diamonds
"Let us not be too particular, it is better to have old second hand diamonds than none at all', observed Mark Twain.
Diamond Discoveries
Diamonds seem to have been known for about 3,000 years, being mentioned in Exodus chapter 28, however in early times, other hard minerals were often confused with diamond.
Diamond Imitations
Although this chapter does not really belong in a Handbook of Diamond Grading, some of the most important diamond substitutes and their properties should be mentioned and short hints given to help to differentiate between them.
Diamond Certification From Independent Laboratories
Diamond certification is essential when you're buying a diamond and is different from a jeweler's appraisal, although the certification is part of any appraisal.
Diamond Color
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Most shoppers are looking for a "white" diamond, in other words, a colorless diamond, but the larger the gem, the more expensive it is to buy a truly colorless stone.
Diamond Collections
Diamonds are the most precious gems that are coveted by all. It is considered to be a symbol of eternal love. The different manufacturers across the globe offer a wide range of diamond collections to the customers.
Diamond Bourses
The word "Bourse" refers to a private stock, bond, or commodities exchange similar to the NYSE. Diamond Bourses are basically trading exchanges for loose, cut and uncut diamonds.
Diamond Carat Weight Guide
What is a Carat?
A carat is the unit of weight used to measure diamonds and other precious gemstones. The term carat is derived from the Greek word keration, meaning carob beans.
Diamond Color Guide
When most industry experts discuss a diamond's color, they are typically referring to a diamond's transparancy, or lack of color.
Diamond Solitaire Pendants.
When someone says diamond pendants, the picture that pops into your head is usually of diamond solitaire pendants. There is a good reason for that.
DIAMOND POLISH
Polish defects on diamond surface
Polish refers to the degree of smoothness of each facet of a diamond as measured by a gemologist.
Diamond - The King of the Gemstones
DIAMOND - The Hardest Gem
Diamond is the most important of all gemstones. It is easily the best known of all gems, having a long and colorful history throughout the civilized world.
Diamonds
When giving a gift to someone you love, diamond jewelry is always a great first choice.
Diamond Carat Weight
Carat is a unit of measurement used to weigh diamond and gemstones. One carat is equal to 200 milligrams, or 0.20 grams. In the common jewelry parlance, carat is also measured in points where 1 carat equals 100 points.
DIAMONDS GEMOLOGY
The lab's mission is to take the guesswork out of buying diamonds or a precious stone. EGL clients are professional wholesalers, retailers, manufactures and craftsman in the diamond industry.
Diamond
Mineral composed essentially of carbon crystallized at extremely high temperatures and pressures; in nature, diamonds form 150 to 200km (93 to 124 miles) or more below the earth's surface.
Diamond Cut: The Shape
CUT of a diamond pertains both to the shape (round, marquise, princess, etc.), and to the make (how well it is cut for proportion and finish).
Diamond Color
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In their purest form, Diamonds are all White by nature. White Color doesn't actually mean that the Diamonds are physically White in Color (like a piece of paper), but that they are Colorless, or have no Color in them.
Diamond Valuation and jewellery Appraisal
DIAMOND TERMINOLOGY AND SPECIFICS
Blemish Any surface imperfection on a fashioned diamond. Also, a natural or an extra facet, visible on or through the crown, usually is considered a blemish.
Diamond Ring Settings
Whether you're choosing a diamond solitaire, a ring with a number of stones, or an open-work lattice ring in which the diamonds flow along the lines of the setting, ...
Diamonds Found in South Africa
The occurence of diamonds in the blue ground of South Africa, the Premier mine, the way the mines are worked, and the diamonds of German South West Africa ...
DIAMONDS The best-known of all gems, diamonds are an extremely hard crystalline form of carbon which
is created under enormous heat and pressure deep within the earth's crust.
Diamonds
Click Here for Techinical Specification
Diamonds have always exercised a special magnetism on the human race, the female of the species in particular.
Diamond Education and Guidance
Become a diamond expert with our Diamond Education.
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Diamond buying guide
Most people know the four C's of diamond buying - color,
clarity, carat weight and cut. Many focus on size as the determining factor of
price and quality, but there's far more to valuing a diamond than how big it
is.
diamond glossary
Listed below, in alphabetic order, are the most widely used terminology regarding diamonds. You may find them helpful when buying a diamond.
Diamond Glossary
Abrasion: Tiny nicks along facet junctions, producing white fuzzy lines instead of sharp crisp facet edges.
American Gem Society (AGS): An educational institution for gemological studies.
Diamond is an allotrope of carbon. It is the hardest known natural material and the third-hardest known material after aggregated diamond nanorods and ultrahard fullerite.
Diamond Jewelry Resources
Beautiful Birthstones List. Use our free list of birthstones to understand the month, stone and color combinations.** ...
Diamond
Chemical composition -- Almost pure carbon, crystallized under extremes of heat and pressure.
Diamond or Cubic Zirconia: Knowing the difference can save you money!
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Diamond Glossary
Here are some common words used in the Diamond Industry and on this web site ...
Diamond Tennis Bracelet
A bracelet featuring a full hoop of diamonds, suitable for casual or formal wear.
Emerald Cut
A rectangular diamond cut.
Diamond Anatomy
Wondering what on earth is the diamond's pavillion? Table? Culet? The graphic and supporting text below explain the various "parts" of a diamond.
Diamond Syndicate - In the early days of South African diamond fields, the word "syndicate" was used to refer to various groups of individuals and companies that held controlling interests in diamond production and distribution.
Diamond clarity
Concepts
Diamonds form naturally deep within the Earth under tremendous pressure and extreme heat, and as a result, most contain internal or external features even in their polished state called clarity characteristics.
Diamond
Not necessarily colourless
It really is not our job here at the International Colored Gemstone Association to tell you all about diamonds.
Diamond Cut Paramaters
In a round cut diamond, measurements are generally listed as maximum diameter, minimum diameter and total depth. The average of the first two measurements is the real "size" of a diamond.
Diamond Rough:
A diamond still in its natural state, before faceting or polishing.
Diamond-Cut: ...
About Diamonds
The Diamond is the birthstone of April and the anniversary gemstone for the 10th and 60th years of marriage. Since diamonds are composed of a single element, they are the purest of all gemstones.
2. AGS Diamonds
Your information source for ideal cut AGS certified diamonds.
Canary Diamond
Centenary diamond
Weighing 273.8 carats, this is the third largest diamond to be produced from the Premier mine.
Diamonds Clarity Enhancement
Anyone purchasing a diamond must also know that many diamonds today are not treated just for color-enhancement, but also for clarity enhancement.
Diamond, which is solely composed of the element Carbon, is the hardest substance known to man. Diamonds were formed many millions of years ago more than one hundred miles below the earths surface.
Diamond Certification
Loose diamonds from Diamond.com are graded by the world's most respected grading entities: the Gemological Institute of America (GIA) and American Gem Society Laboratories (AGS).
DIAMOND CRYSTAL STRUCTURE
The unit cell (red) of diamond is a cube. Groups of five carbon atoms (blue spheres) form tetrahedra at the cube corners, at the centers of each of the cube faces, and at four sites within the cube.
Diamonds are valued for their incredible brilliance, modest fire and extreme hardness. Diamonds are chemically pure carbon, differing from the graphite used for pencils by their crystal structure.
Diamond is the hardest substance ever known. But coatings, products and other materials used to enhance its appearance can be washed away by the use of harsh cleansers and vigorous scrubbing in everyday wear and tear.
Diamond Grades used in Our Jewelry
The G, H & I (Color grade) diamonds used in our jewelry are considered to be near colorless.
Under normal natural or artificial light, even expert graders can't discern the difference ...
Diamond
Gemology
Myths
Sources
Choosing tips
Where to buy
The 4 C’s
The price of a diamond is determined by four main factors, forming what is called call the 4 C’s: Carat weight, Clarity, Color and Cut.
A diamond which has been exposed to radiation.
Master Stones / Master Set
A set of color comparison diamonds that defines diamond color grades in the normal (D-to-Z) range.
A diamond's colour grade actually refers to the lack of colour. In other words, diamonds that are white, containing little or no colour, receive higher quality grades than those with visible colour.
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FULL CUT DIAMOND - A description of a brilliant cut, round stone with 57-58 facets.
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GIRDLE - The narrow band around the widest part of a polished or faceted gemstone. It divides the crown and pavilion facets.
Fancy color diamonds - Any color diamond other than yellow, brown or gray.
Fancy shapes - Any gemstone shape other than round, also called fancies.
Articles About Diamonds &
Colored Gemstones
"Gary has really good service, helpful feedback on options, responded promptly to questions, inspected the diamond before shipping, and a great price.
Diamond Sources: In many African countries where diamonds are mined, slave labor and torture have been used to coerce African diamond miners, ...
Diamond Selection - 4Cīs and an F
When purchasing a diamond, and considering the 4 Cīs, there is one often overlooked aspect of diamonds that really should be addressed, fluorescence.
Diamond: A clear transparent precious gemstone composed of pure crystallized carbon which has been highly compressed over millions of years. Diamonds are the hardest substance known to mankind, rating a 10 on the Mohs scale.
DIAMONDS
Diamond Mines of the World
India: The most famous diamond mines in India were those of the Golconda region between the Godavari and Krishna rivers in what is today the Eastern state of Andhra Pradesh.
 See also: Stone, Jewel, Color, Gemstone, Jewelry
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