Cut, colour, clarity, carat
Diamonds
A diamond is the most examined object you will ever buy. These guides explain what the grades mean, where the price hides and how to walk into a jeweler knowing more than the sales floor expects.
The guides
Diamonds
How the 4Cs really affect price, whether a lab-grown diamond is right for you, which shape suits which hand and how to read a GIA, IGI or HRD report. The Paliana diamond guides.
Cut, colour, clarity, carat
The 4Cs, Explained Without the Sales Talk
What each of the four grades really changes in a diamond, which ones you can see with your own eyes and where the price hides. The 4Cs explained for buyers, not for sales floors.
Read the guide
Same stone, different market
Lab-Grown or Natural: An Honest Comparison
Lab-grown diamonds are chemically identical to mined ones and cost a fraction. Here is what you gain, what you give up and how to decide with both eyes open.
Read the guide
Round, oval, cushion and the rest
Diamond Shapes: Which Cut Suits Which Hand
Round, oval, cushion, emerald, pear, marquise, princess, radiant and Asscher: how each shape looks on a hand, what it costs and where it hides flaws or shows them.
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The report, line by line
How to Read a Diamond Certificate (GIA, IGI, HRD)
A diamond report is the only part of the sale that is not an opinion. Here is what every line means, which laboratories the trade trusts and how to check a report is genuine.
Read the guideThe tool for this section
Diamond Price Estimator
Estimate the retail price of a natural or lab-grown diamond from carat, colour, clarity, cut and shape, and see what a buyer would typically offer for it.
The 4Cs, priced
Diamond Price Estimator
Estimate the retail price of a natural or lab-grown diamond from carat, colour, clarity, cut and shape, and see what a buyer would typically offer for it.
OpenUS, UK, EU, Japan
Ring Size Converter
Convert ring sizes between US, UK, EU and Japanese systems from the inside diameter or circumference of a ring, with instructions for measuring at home.
OpenFree valuation
Sell Diamonds and Gemstones
Sell a diamond ring, a loose diamond, a sapphire, ruby or emerald. Describe carat, certificate and setting and receive offers from vetted gemstone buyers.
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