This carat weight estimate can be particularly useful if you are looking to sell your diamond online. In 1913, the carat weight was officially adopted as the unit of measurement for diamonds and other gemstones in the United State. And it quickly spread to global usage. Here the carat was defined as weighing 200mg. As a result, in 1907 a meeting was held: the General Conference on Weights and Measures, an official global conference to discuss worldwide physical measurements. This meant that the carob seed system was not an accurate measuring tool. It was later realized that carob seeds can vary significantly in weight depending on region. The word “carat” stems from the word carob. They choose carob seeds as they varied little in weight and were light enough to measure differences in small stones. Early gem traders used carob seeds as units of measurement to weigh their gems. The history of diamond weight extends as far back as Ancient times.
Why Is Diamond Weight Measured In Carats? 99 carats will be much less valuable than a 1 carat diamond and a 1.99 carat diamond will be much less valuable than a 2 carat diamond.īut remember that while carat weight can have a significant effect on the value of a diamond, there are still many other factors that impact price. Many consumers are interested in purchasing a diamond that they can claim is 1 carats, 2 carats, 3 carats, etc. There are some nuances to how diamond weight affects value. Due to the rarity of larger stones, as weight increases, price-per-carat also increases significantly (all other things being equal). Larger diamonds are much rarer and harder to find than smaller diamonds, and consumers generally desire larger stones over smaller stones. Along with color, cut, and clarity, diamond weight is one of the 4 Cs used to assess diamond quality and value. This record-breaking sale is evidence of the high value of large diamonds.Ĭarat weight is one of the largest determinants of the value of your diamond. In 2013, the largest diamond ever sold at auction, a 118-carat gem, was purchased for a whopping $30.6 million. The bottom line is that the greater the carat weight, the more a diamond is worth. How Does Carat Weight Affect Diamond Price? This is because different shapes of diamonds with the same weight will often appear to be drastically different sizes. Two diamonds of the same weight can have a dramatically different look and size.Įxample: A 2-carat diamond with a high depth and small diameter may appear much smaller than another 2-carat diamond with low depth and a large diameter. While a 300-carat stone will certainly be larger in size than a 3-carat stone, there is no precise correlation between diamond weight and size. Though, typically, the more a diamond weighs, the larger it will appear, this does not tell the whole story. Total carat weight is often abbreviated as “ctw” (or “CTW”), “tw” (or “TW”), or diamond total weight, “dtw” (or “DTW”).Ĭarat weight does not directly correlate to size.Sometimes carat weight is denoted as “cw” (or “CW”) or diamond weight, “dw” (or “DW”).Carat weight is often abbreviated to “ct” (or “CT”).Specialized measuring tools are often used to ensure precise, accurate measurements.Ĭarat weight refers to the weight of a single stone, whereas total carat weight refers to the weight of all of the stones on an item of jewelry. Because of this, carat weight is typically measured to the thousandth of a carat and then rounded to the nearest hundredth. However you can determine the approximate weight of your diamond with our f ree online diamond weight calculator. Using the diamond shape, length, width, and height, WP Diamonds will provide an estimate of your diamond’s carat weight, rounded to the nearest hundredth.Ĭarats are a tiny unit of measurement and even a small discrepancy in diamond weight can drastically impact the value of a stone.
The quick answer is that without the proper specialized tools, it can be difficult to get an accurate measurement of your diamond’s carat weight at home. Carat is the standard unit of measurement across the jewelry and gem industry. A single carat is equivalently to 0.2 grams, or about the weight of a raindrop.
Contrary to popular believe, carat weight denotes weight, not size. Why do we measure diamond weight in carats?Ĭarat is a unit of measurement used to weigh diamonds and other stones.How does carat weight affect the value of my diamond?.How can I measure diamond carat weight?.
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