International O-Ring Size Cross Reference Table.What ultimately matters is the cut quality and performance of the diamond. I want to emphasize that this is an estimated weight and for fancies, some deviations from the figures are OK. You can try to estimate and extrapolate the extra 1/5 carat weight. I’ve only included an arbitrary 2ct size for the oval diamond carat chart. If you intend to buy a fancy cut diamond, this guide is indispensable.
For shapes like ovals, marquises and pears, it is best to seek the help of a professional to determine the extent of the bowtie effect. The overall outline, locations and types of inclusions are all factors that play an important role in its appeal.Īlso, you should view ASET images when selecting a fancy cut diamond in order to determine its optical performance. While dimensions can help you weed out badly cut stones, you should view (magnified) photographs/videos to determine the personality of the diamond. The carat size to mm chart should only be used for visualization purposes and not as a tool to help you select a diamond.Ĭhoosing a beautiful fancy cut diamond cannot be done based on dimensions or grading reports alone.
I want you to get this straight before you commit an expensive mistake when buying diamonds. How to Use the Diamond Size Chart Correctly? Princess Cut Diamond Size Chartĭownload your printable carat size chart (scaled accurately to A4) and use it as a convenient reference when you go shopping for an engagement ring. This chart is an accurate representation of carat weight to mm dimensions. In this case, a heart shaped diamond may exhibit dimensions of 6.15mm x 6.80mm and this is perfectly acceptable.ĭon’t Forget: Download your printable carat size chart that you can easily carry around to visualize and perform diamond size comparisons. Obviously, the dimensions of a 0.90 l/w ratio heart diamond would no longer be 6.50mm x 6.50mm. Most people ( including myself) prefer fatter looking stones with length to width ratios of around 0.90:1. This is based on a length to width ratio of 1:1. In our charts, the dimensions of a 1 carat heart shaped diamond is indicated as 6.50mm x 6.50mm. Let me illustrate by using the heart shaped diamond as an example…
You need to understand that the “best” length to width ratios for fancy shaped diamonds are largely up to personal tastes and there’s no right or wrong if you prefer a particular look. What I want to highlight here is that the dimensions/diameters shown here are based on “ideal” length to width proportions. Click here to find out more…įor people who are looking up carat size to mm information for fancy cut diamonds, we had also compiled some useful reference data on this page. James Allen has created a useful graphic illustration to help you see how an engagement ring with varying diamond sizes would look like when worn. Visualizing And Comparing Diamond Sizes on a Hand All images are drawn precisely to scale for A4 sized paper printing. Printable Carat Weight to MM Chart: Here’s a free diamond sizing chart that you can download and print out for your convenience.
Hopefully, this clears up the misunderstanding of carat weight and actual sizes. Likewise, the physical size of a 2 carat diamond (8.2mm diameter) isn’t twice as big as that of a 1 carat diamond (6.5mm diameter). Even though the carat weight is 50% of a 1 carat stone, it doesn’t face up twice as small! Just because a diamond is twice as heavy as another stone, it doesn’t mean it will look twice as large as the other.Īs you can see above, the size of a 1 carat diamond is approximately 6.5mm ( based on the assumption that the stone is cut to ideal proportions). Now, I want to address a common misconception that people have when shopping for diamonds. Due its cutting style that’s optimized for brilliance and dispersion, round brilliants make up for more than 60% of all diamonds sold in the world. Round Diamond Size ChartĬurrently, the standard 57 facets round brilliant cut is the most popular choice of shape. Note: depending on your screen resolution, the actual size seen may vary. We have compiled diamond weight charts for the most popular diamond shapes in the market! If you are having problems with visualizing actual diamond sizes in real life, you’ve come to the right place.