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Diamonds 101

Diamond Shapes | The 4Cs Education

·3 min read

Once you’ve figured this one out you’re in ‘good shape’ on your diamond buying journey! Here at Rare Carat we see millions of searches. We’ve crunched the numbers on which diamond shapes are most in-demand:

Most popular diamond shapes chart.png

And here’s our quick need-to-know on each one in order of popularity - with a rough estimate for the cost of a 1 carat H color VS1 clarity diamond by shape.

Round Brilliant Cut Diamonds


If you’re scared of going wrong, this is definitely a safe choice. Classic, traditional, and the most popular one by far. However, you could get the same size (carat weight) in a non-round for less. 1 ct Round H VS1 starting at: $6,200

Read more about the round brilliant cut here

Cushion Cut Diamonds


So this is definitely ‘in’ right now. Meghan Markle, Priyanka Chopra all got cushion diamonds in their engagement ring. It kind of looks like a round from far away, it’s still a classic shape, and is cheaper than the round for the same size. 1 ct Cushion H VS1 starting at: $3,400

Read more about the cushion cut here

Oval Cut Diamonds

oval stock.png

Think round but just a little stretched – and it’ll make her fingers look longer and more elegant. 1 ct Oval H VS1 starting at: $4,675

Read more about oval shaped diamonds here

Princess Cut Diamonds


You have softer, rounder shapes like above – and more angular ones like this the princess cut. It comes with a different set of things to watch out for like symmetry and ‘chevrons’. 1 ct Princess H VS1 starting at: $4,150

Read more about the princess cut here

Emerald Cut Diamonds


This Great Gatsby look shines in a totally different way – it’s more like a ‘hall of mirrors’ than your traditional sparkle. Beyoncé rocks a massive one that’s worth $5m, for what that’s worth. 1 ct Emerald H VS1 starting at: $4,150

Read more about emerald shaped diamonds here

Radiant Cut Diamonds

A radiant shaped diamond

Well, it’s like a princess cut and an emerald cut got together, and you know, had a baby. 1 ct Radiant H VS1 starting at: $3,850

Read more about radiants here

Pear Cut Diamonds


You’ve got wide ones, thin ones – and the rule to follow is the Goldilocks principle: find one that’s ‘just’ right in terms of length/width ratio. 1 ct Pear H VS1 starting at: $5,100

Read more about the pear shape here

Asscher Cut Diamonds

A square step-cut asscher diamond with cut corners shown against a white background

Totally like the Emerald’s younger sibling – just with cut corners so it’s like an octagon rather than a rectangle – again, very Great Gatsby. 1 ct Asscher H VS1 starting at: $4,000

Read more about asscher's here

Marquise Cut Diamonds


OK, not the most popular but it is one of my favorites. You just need to be careful on getting the right one – watch out for the length/width ratio and ‘bowties’. 1 ct Marquise H VS1 starting at: $4,500

Read more about the marquise shape here

Heart Cut Diamonds

Image of a sparkling heart cut diamond with a black background

Like all matters of the heart, this is a tricky one. It’s an awkward shape to get right when cutting but if you like the symbolism for it, go ahead. 1 ct Heart H VS1 starting at: $3,575

Read more about heart shapes here

Whats the best cut grade for the shape? Rare Carat Ideal! Check it out here

Looking for a deal? Check out all of our promos here

Get started searching for your favorite shape HERE. And, as always, our graduate gemologists are standing by over in the chat bubble to give you a hand searching or to answer any additional questions you may have about diamond shapes.

Dr. Rian Mulcahy
Rian is officially a Diamond PhD - just ping us if you’d like to read her fascinating 200-page thesis, titled Facets of Value: An Investigation into the Formation of Worth in the Diamond Market. She has consulted various firms all along the pipeline, from the rough diamond market to the recycled diamond industry. She holds an MA in Globalisation and Development from University College Cork and a PhD in the Sociology of Diamond Valuation from the London School of Economics.