About Diamond Database

Diamond Database (diamdb.com) is a free online diamond size visualization and comparison tool. It provides a platform for comparing and learning about diamond shapes and sizes. It allows you to compare actual, real-world diamond sizes (in millimeters), which you can view on a ring and finger of desired dimensions, giving you an idea of how the diamond(s) would look on your finger. It also provides useful information such as evaluation of the face-up size, detailed buying guidelines, and more. Whether you are buying an engagement ring, are an aspiring gemologist, or just curious about diamonds, you've come to the right place.

The main goal of this site is to make it easier to understand how big a diamond will look in real life, which is especially valuable, if you're buying online.

Who runs DiamDB.com?

This website is a one-man operation. It was created and is maintained entirely by me, Gregor.

It all started many years back when I was buying a diamond online. Immediately, there was a problem: I couldn't see the actual sizes on my screen, nor could I compare the sizes of the stones. And that was it - that was how the idea for diamdb.com arose. I knew that I could build a website where anyone could check and/or compare actual diamond sizes right on their screen. As an IT professional with a deep interest in gemology, I was uniquely qualified to make it happen.

It was initially meant to only be a simple size comparison website, but it grew to be much more. I've analyzed a huge database of diamonds (700,000) and developed an algorithm for evaluating diamond sizes. The information on this website is based on an in-depth diamond size analysis from a real-world diamond database (by the way, this is how the site got its name).

I spent years researching and learning all I could about diamonds, the science behind them, as well as the ins and outs of a very competitive diamond industry. As of 2026, I have accumulated over 14 years of experience, backed by empirical, real-world data.

A lot of time has been poured into the creation and continuous improvement of this project, and I sure hope you will find it helpful in your quest for that perfect diamond.

Thanks for stopping by!

Gregor B.

P.S., I've also created gemsize.org, where you can compare colored gemstones, including fancy colored diamonds.

If you'd like to contact me, use the contact page or send me an email at info(at)diamdb(dot)com.