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Article #9: Diamond Carat Weight: Shoppers Buying Guide

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The weight of a diamond is usually the larger the carat weight, the fewer
expressed in carats. The term carat diamonds are available. Diamonds loose
originated in ancient times when approximately 40-60% of their rough
gemstones were weighted compared to the weight in the cutting and polishing
carob bean, where one bean weighed about process. Therefore, it can take over a
one carat. The term was standardized and two-carat rough diamond to produce a 1.00
converted to the metric system in 1913 so carat finished diamond. Most diamonds
that the current carat equals 0.2 grams, mined are very small with larger stones
which is a little more than 0.007 ounce. relative rare. It can take many
Knowing the technical definition of a thousands of rough diamonds mined to
carat is one thing, but the diamond yield one that results in a 1.00 carat
shopper needs to understand carat weight finished diamond. The price of larger
so they can make the best purchase carat weights increases with the rarity.
decision for their diamond. The carat For example, a two-carat diamond can be
weight of a diamond influences several almost four times the price of a
key factors that should be part of the one-carat diamond with the same quality.
diamond decision. Even with the same shape of diamond, the
Sometimes in the jewelry trade, the term carat weight does not tell you the size.
carat weight is used synonymously with It is similar to asking how tall a
size. The implication is that all 200-pound man is. Just as the height of a
diamonds that weight one carat are the man can vary with the same weight, a
same size and those that weight two diamond's length and width can vary for
carats are the same size. This is not the same carat weight. The challenge is
accurate and an astute diamond shopper to find diamonds that have the right
will work to understand the difference depth parameters to give them beautiful
between size and weight. brilliance and sparkle in addition to big
The size of diamonds can vary with the size for the carat weight.
same weight because the shape of the The weight of a diamond also affects the
diamond can be different. A one carat size, as diamonds get heavier the length
round diamond has a very different length and width do not go up as fast as the
and width than marquise shaped diamond weight. For example, a two carat round
weighing one carat. diamond weighs 100% more than a one-carat
The diamond industry has developed its diamond but the surface area you see only
pricing structure based on the carat increases 64%.
weights that consumers request when they Note that as the carat weight goes up,
go into a jewelry store. Even carat the price per carat goes up faster and
weights have taken on a social importance the size goes up slower. The result is
far above their simple weight so that as the carat weight goes up it takes
consumers typically ask for whole carat a lot more weight and even more money to
weights or simple fractions of a carat. make the diamond noticeably bigger to the
For example, a diamond shopper might ask eye.
for a half-carat, one carat, a carat and Perhaps the biggest question a diamond
a half, or a two-carat so the diamond shopper has is what carat weight of
industry sets the price increases at diamond they should purchase. Of course,
these weights. A diamond weighing 1.00 their budget is going to be limiting
carats has a significant higher price per factor in determining what carat weight
carat than one that weighs 0.99 carats so to buy but the target carat weight is
diamond cutters to get the finished influenced by several factors including
diamond weight at or over these requested the size of the finger, type of mounting,
carat weights. As a result, there are and the carat weight of friends and
many more diamonds cut just over 1.00 family diamonds.
carat than just under. Knowledgeable Buying the right diamond requires
shoppers know there are some great values consideration of many factors and
at just under the even carat weights but understanding the impact of carat weight
with few diamonds cut, the demand is is one of the keys to making the best
greater than the supply. purchase decision possible.
The weight also affects the price in that






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