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Topic: Carat (purity)


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  Carat (purity) - Wikipedia, the free encyclopedia
Carat is a measure of the purity of gold and platinum alloys.
Therefore 24-carat gold is pure gold (99.99%), 12-carat gold is 50% purity, etc. In the United States and Canada, the spelling karat is usually used for the measure of purity, while carat refers to the measure of mass.
The carat system is increasingly being complemented or superseded by the millesimal fineness system in which the purity of precious metals is denoted by parts per thousand of pure metal in the alloy.
en.wikipedia.org /wiki/Carat_(purity)   (152 words)

  
 Carat - Wikipedia, the free encyclopedia
Carat (mass) is a unit of mass for gems.
In the United States, carat almost exclusively means the unit of mass.
Carat (purity) is a unit of purity for gold.
en.wikipedia.org /wiki/Carat   (183 words)

  
 Online Etymology Dictionary
measure was the equivalent of the Roman siliqua, which was one-twentyfourth of a golden solidus of Constantine; hence the word took on a sense of "a proportion of one twentyfourth" and became a measure of gold purity (1555).
Eighteen carat gold is eighteen parts gold, six parts alloy.
It is unlikely that the carat was ever a measure of weight for gold.
www.etymonline.com /index.php?term=carat   (91 words)

  
 Diamond Carat Weight: Diamond Carat Size Chart and Scale Information
Carat is not a measure of a diamond’s size, since cutting a diamond to different proportions can affect its weight.
The word carat actually comes from the word carob (as in carob seeds), which is how ancient cultures measured the weight of diamonds on their scales.
Each Carat is divided into 100 parts called 'points.' So a 1-carat diamond has 100 points, a ¾ carat has 75 points, etc. Points in a fraction of one carat are measured within ranges, so that a ¾ carat diamond may have between.69 and.82 points and still be considered a ¾ carat.
www.diamond.com /education/carat_weight.asp   (540 words)

  
 Carat - Wikipedia   (Site not responding. Last check: 2007-10-13)
The carat is a unit of mass used for gems.
However, in 1907 the metric carat of 200 milligrams was adopted, which is now universally used today.
The carat (spelt karat in the U.S., to distinguish it from the unit of mass above) is also a measure of the purity of precious metals such as gold.
www.facetroughgemstones.com /Carat.html   (88 words)

  
 Indbazaar :: India Consumer Guide - Feature
In most cases, the carat of the piece of jewellery is mentioned on it, apart from the hallmark of the jeweller.
For instance, 22 carat gold is predominantly used in India; while 21 carat gold is preferred by Arabs.
The shape of your face, your height, the colour of your skin, your complexion, your hairstyle, the slenderness and length of your neck, the slenderness of the limbs, the kinds of makeup you wear, your overall personality and even your dressing style are important factors for your gold jewellery to look beautiful on you.
www.indbazaar.com /consumerguide/index2.asp?ct=33   (461 words)

  
 Glossary of Jewelry Terms - Shapiro Diamonds
Not to be confused with "karat", which is a measure of gold alloy purity.
Often abbreviated as "ct." one carat is equal to 200 milligrams (one fifth of a gram).
A carat is one of the 4 Cs of diamond grading.
www.shapirodiamonds.com /jewelryglossary.htm   (872 words)

  
 tata.com : Average purity of gold less than 22 carat: Tanishq survey
In a survey conducted on gold purity across 40 cities in the country, the average purity of gold was found to be 19.43 carat as opposed to 22 carat as claimed and in some cases the gold received in the capital was found to be as low as 16.32 carat.
In the survey conducted during the ‘impure to pure exchange offer’ last year by Tanishq, the purity of gold was found to be lowest in northern city of Kanpur closely followed by Ranchi.
Highest purity levels were found in Guwahati which reported a caratage of 20.5 per cent, a Tanishq release said.
www.tata.com /titan/media/20030623.htm   (166 words)

  
 Online Jewellery Store uk | diamonds, watches, perfumes | Free Home delivery for £ 100 Purchase
It is important that the Carat is not confused with ‘Karat’, the term used to describe the purity of gold.
One carat (ct.) is equal to 200 milligrams (1/5 gram).
Diamonds over one carat in size are progressively becoming a rarity and hence, generally speaking the larger the diamond, the higher the price despite potential conditions within the other features, clarity, cut and colour.
buywatchesonline.co.uk /carat.asp   (223 words)

  
 carat conversion - conversions to and from carats
One carat is equal to 1/5 of a gram (200 milligrams).
Stones are measured to the nearest hundredth of a carat.
A one carat round diamond of average proportions is approximately 6.5mm in diameter.
www.metric-conversions.org /weight/carat-conversion.htm   (190 words)

  
 Harriots.com - LearningCenter: Diamond Carat
One carat is equal to 200 milligram or 0.2 grams.
Carat is the easiest of the 4Cs to determine but remember two diamonds of equal carat weight can have very different values depending on the quality of the cut, color, clarity.
Don’t confuse this 'carat' with the term 'karat,' which is the measure to determine the purity of gold.
www.harriots.com /DiamondCarat.aspx   (158 words)

  
 Gaba Diamonds - The Four C's   (Site not responding. Last check: 2007-10-13)
A carat is equal to 0.200g, this being a value that was fixed at the end of the nineteenth century to merge the customary values of individual markets.
The word carat as far as we know was most probably derived from the carob seed (qirat in Arabic) which, being quite constant in weight, once served as a counter weight on the Market for precious stones.
Thus pure gold is 24 carat, or 24k, the gold commonly used in jewelry is 18 carat, or an alloy which is 18/24 or 75% gold and so on.
www.gabadiamonds.net /Four.htm   (963 words)

  
 Welcome to 1 Diamond.com - Your source for diamonds
For example, a 0.75 carat diamond is the same as a 75-point diamond or a 3/4 carat stone.
The carat weight, or mass, of the diamond is an important determiner of value.
Carat weight, while important, is only one aspect of value.
www.oz.net /~gtc/diamonds/carat.htm   (156 words)

  
 Diamond Sizes, Diamond Size, Diamond Size Charts, Carat Weight
Diamonds are measured in carats, a small unit of measurement equal to 200 milligrams.
A diamond's carat weight should not be confused with the "karat" of gold, which is actually a measurement of purity, and size.
Therefore, a half-carat stone may be refered to as a "50-pointer", a quarter carat, "25-points" etc. Carat is the easiest of the 4 C's to determine because of the use of sophisticated measuring equipment.
www.adiamor.com /EducationCenter/CaratWeight.htm   (159 words)

  
 Carats, Chum, Doozies, Going Down?, Cut and Dried and Some Very Cold Brass Monkeys.
"Carat" and "karat" are indeed related, and spring from the same source, the Arabic word for "bean pod." Now, much as we all love beans, not many of us would go so far as to equate the finest jewels and gold with lowly little legumes, so how did we come up with "carat" and "karat"?
Well, when jewels first began to be used as a means of exchange and payment, people needed a way to measure their relative weight and consequent value.
A "carat" today is standardized at 200 milligrams, which takes the burden off the beans.
www.word-detective.com /back-r.html   (1791 words)

  
 Carat weight   (Site not responding. Last check: 2007-10-13)
This argument is similar to that of cereal boxes or potato chips, where "contents are sold by weight, not volume." Also, don't confuse the carats of a diamond with the carats of a different stone.
Another common source of confusion: The karats used to measure the purity of gold have nothing to do with the carats used to measure the weight of a diamond.
If size (carat weight) is your most important attribute, that is perfectly acceptable -- but do consider the other 3 Cs to make sure you understand your tradeoffs.
www.diamondreview.com /tutor/4cs/tutor_4cs_carats.shtml   (371 words)

  
 Carat Weight
The term "carat" is universally accepted for most gemstones as a measure of weight.
Carat is also often confused with size even though it is actually a measure of weight.
One carat can also be divided into 100 “points.” A.75 carat emerald is the same as a 75-points or 3/4 carat emerald.
www.esmerald.com /carat_weight.shtml   (479 words)

  
 Minesite Story   (Site not responding. Last check: 2007-10-13)
To call this alloy 9 carat gold is to perpetuate a confidence trick and it does not sit easily for the WGC to pontificate about the investment qualities of pure gold while allowing this farce to continue.
A similar ring made out of 9 carat gold is, therefore, worth no more than £16.68, but as already pointed out the gold percentage of the alloy is so low that it has virtually no real value.
In the States the lowest gold purity that is acceptable is 12 carat which is half gold and half alloy, but the scale really starts at 14 carat and works up to 22 carat.
www.minesite.com /storyFull.php?storySeq=218   (860 words)

  
 Carat Weight   (Site not responding. Last check: 2007-10-13)
All diamonds are measured in carats (not to be confused with Karats, which are used to measure the purity of gold).
For example, a 50 point diamond is the equivalent of a 1/2 carat stone (0.50).
These are the rarest and most beautiful gems treasured for their absolute purity.
www.astreinjewelers.com /carat.html   (518 words)

  
 Definitions of 18 k gold and 900 silver
It is spelled carat outside the United States but should not be confused with the unit used to measure the weight of gems, also called carat.
A mark weighed 24 carats (in this case, the carat was the same as that used in the weighing of gems and was theoretically equal to the weight of the seed of the coral tree).
Pure gold could not be used to produce marks because it was too soft, so copper or other metals were added to produce a hard alloy; the purity of the coin was then expressed by the proportion of its carat weight that was actually contributed by gold.
www.fromcairo.com /gold_and_silver.htm   (923 words)

  
 Diamonds On Fifth   (Site not responding. Last check: 2007-10-13)
A carat is the term used for the measurement of a diamond's weight.
Therefore, a half-carat stone may be referred to as a "50-pointer," a quarter carat, "25-points," etc. The smaller stones used in pave or channel settings are sometimes called melee.
In certificates, appraisals and receipts, however, the weight of your diamond should be written in carats, rounded to 1/100ths, such as.25 carats;.50 carats, 1.20 carats, etc.
www.diamondsonfifth.com /learn/carat.html   (210 words)

  
 [Ganoksin] Jewelry Making - Carats and Karats
Carat, karat, caret, and carrot are all pronounced the same, but each has a different meaning.
Carat and karat are the modern derivatives of carratus.
A karat is a unit for measuring the purity of gold.
www.ganoksin.com /borisat/nenam/sandra02.htm   (644 words)

  
 Crystal World Bournemouth fine collectibles and jewellery shop,jewellery repairs in ...
A carat is the 24th part weight of the whole, so 19 1/2 carat gold must contain a minimum of 19 1/2 parts of pure gold per 24 parts total.
From 1544 the standard mark was changed to a Lion Passant, a Crown was introduced in 1798 for 18 carat gold and from 1844 the crown was used for both 22 and 18 carat standards.
The "Britannia" mark for silver of the new higher standard of 95.8% - the highest possible purity before the silver became too soft to be workable - which was introduced to discourage clipping, a practice which involved scraping off minute pieces of silver from the edge of coinage.
www.crystalworld.co.uk /amazinginfo4.html   (1229 words)

  
 The 4 C's of diamonds -- diamond clarity, diamond colors, diamond cuts, diamond weights -- diamond grades for the ...
The 4 C's are four variables that are used to calculate the value of a diamond -- Clarity, Color, Cut, and Carat Weight.
Carat is the unit of weight for the diamond.
A carat is further subdivided in 100 points (0.01 carat = l point).
www.diasource.com /fourcs.asp   (773 words)

  
 Audreys Claddagh Irish Jewelry Guarantee
Gold is the ultimate precious metal and its purity is always measured in carats, the purest being 24 carat.
Gold of this purity, however, is impractical to wear as jewelry since it is very soft, can damage easy, and cannot maintain the delicate designs of our fine Irish jewelry.
This combination can be understood as a fraction; 10 carat is measured 10/24 or 416 parts gold per 1000, 14 carat is 14/24 or 583 parts of gold per 1000, and 18 carat is 750 parts gold per 1000 parts.
www.audreyscollection.com /guarantee.html   (456 words)

  
 diamond-4-c   (Site not responding. Last check: 2007-10-13)
Carat is the unit of weight for the diamond and the easiest to understand.
Carat weight is simply the weight of a diamond and does not necessarily relate to the size.
Diamonds are weighted in carats and one carat is equal to 1/5 of a gram.
www.woelks.com /diamond-4-c.html   (844 words)

  
 Diamonds. Diamond Rings. Diamond Carat Grading - Diamond Data. Diamonds, Platinum & Gold
Diamonds are sold by the carat (ct), not to be confused with karat (kt), which refers to gold purity.
There are 100 points to a carat, so if a jeweller says that a stone weighs 75 points, he means it weighs 75/100 of a carat, or ¾ carat.
This means that a one-carat emerald will look larger than a one-carat diamond, while the ruby will look smaller than a diamond of the same weight.
www.diamondsandgoldireland.com /pages/carat.htm   (310 words)

  
 Diamond Buyers Guide   (Site not responding. Last check: 2007-10-13)
A carat is a unit of measurement, it's the unit used to weigh a diamond.
The word "carat" is taken from the carob seeds that people once used in ancient times to balance scales.
If she prefers larger jewelry items, and you are working within a budget, you can still find a larger diamond of excellent quality gem by selecting one which is graded slightly lower in terms of color and clarity.
www.diamondcastlejewelers.com /carat.htm   (321 words)

  
 :: JDP :: Jewels De Paragon ::   (Site not responding. Last check: 2007-10-13)
Hallmarking is a method of assessing the purity of gold by a competent authority.
Bureau of Indian Standards undertakes certification of purity of gold jewellery in accordance with Indian Standards IS: 1417 Grades of Gold and Gold Alloys.
A carat is 0.2 grams and there are 100 points (or 200 milligrams) per carat.
www.jewelsdeparagon.com /catalog/quality.php   (1335 words)

  
 carat --  Encyclopædia Britannica
Originally based on the weight of grains or leguminous seeds, which, of course, varied in size from place to place, the carat was equivalent to 0.2053 gram (3.168 troy grains) in London, 0.1972 g in Florence, and 0.2057 g in Amsterdam.
A gold karat is part, or 4.1667 percent, of the whole, and the purity of a gold alloy is expressed as the number of these parts of gold it contains.
It was discovered in 1853 in the Bagagem River (in Minas Geraís state) by a slave woman, who was given her freedom and pensioned as a reward.
www.britannica.com /eb/article-9020223?tocId=9020223   (631 words)

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