How sparkly will your diamond look in person? Our cut score uses each diamond’s unique dimensions to determine just how perfectly it’s cut (and how well it will reflect light).
Cut score is based on a 10-point scale and we typically recommend looking for round diamonds that score a 7.5 or better.
Like a Zillow Zestimate for your diamond. Our Fair Price Estimate is updated daily based on live diamond prices from top online jewelers. Please keep in mind that every diamond is unique and some real-life diamond prices will differ meaningfully from our fair price estimate.
This fair price estimate is not an offer to buy or sell this diamond.
StoneAlgo developed our Visual Carat metric to help you understand whether your diamond looks larger or smaller than its actual carat weight implies.
For example, a 1 carat diamond could have a Visual Carat of 1.05 (meaning it looks like your average 1.05 carat diamond) or a smaller Visual Carat like 0.95 (meaning it looks like a 0.95 carat diamond when viewed from above).
Length-to-width ratio is calculated by dividing the widest part of the diamond by the narrowest part. A length-to-width ratio of 1.00 would be a perfect circle or square. As the ratio rises above 1 the diamond will begin to look more oval or rectangular. For round diamonds you should shoot for a ratio as close to 1.00 as possible and for fancy shapes it really comes down to a matter of preference.
Lab Grown diamonds, also known as man-made diamonds or simply “lab diamonds”, are grown in a highly controlled environment that seeks to replicate the growing process that occurred in nature billions of years ago to create "natural" diamonds.
Lab grown diamonds have a number of benefits which you can read about here.
Our partners at BriteCo offer very competitive insurance pricing. Check them out here.
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Meet StoneAlgo
StoneAlgo began with a simple mission: bring transparency to diamond shopping. Today, we're the largest diamond marketplace in the world with 2,294,614 diamonds from top-rated jewelers like Blue Nile, Adiamor, With Clarity and more.
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We've created the Visual Carat weight metric to describe how large a diamond actually appears when viewed from above. The visual carat is calculated by measuring a diamond’s surface area and comparing this measurement to the expected surface area for different carat sizes of the same diamond shape.
What is not always made clear is that carat (the most common measure for 'size' when it comes to diamonds) is not a measure of surface area but rather a measure of weight.
While it may seem like we are recommending that you find the lowest depth percentage diamonds, this is definitely not the case. A diamond’s dimensions need to be balanced in order for the stone to display optimal light performance. For round diamonds we calculate this using our cut score and for fancy shapes there are general rules of thumb that can be used. If a diamond is too shallow, the diamond won’t return light properly and we’d recommend against buying the diamond even if it appears much larger than its actual carat size.
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