0.13 Carat Diamond
A 0.13 carat diamond measures about 3.3 mm in diameter.
The diamond is the same as a 12 point diamond. The diamond weighs in normal weight measurements precisely 26 milligrams.
For comparison, a diamond with half its carat weight has a diameter of approximately 2.6 mm. A diamond with double its carat weight has a diameter of approximately 4.2 mm.
As you can see there is no doubling in the diameter of a diamond when the carat weight doubles, meaning that you're not getting as much extra visual size as you'd think as you increase from a size of 0.13 carats.
The reason why a 2 carat diamond doesn't appear to be twice as big as a 1 carat diamond is to do with a relationship between volume and area. You can reason about it by taking the example of people - a 120 kilogram person is almost never twice as tall as a person who weighs only 60 kilograms.
One of the best ways to get a feel for diamond size is to look at a few! James Allen has an online tool for finding diamonds where you can select the range of diamond sizes you're interested in and see ACTUAL PHOTOS OF THE DIAMONDS.
For example, in the screenshot below, I'm looking for diamonds between 0.93 and 1.02 carats in size. You can click on the image to go try some searches yourself. I've circled in red where you change the size range you want to search for.
Screenshot of the diamond search tool provided by James Allen.
You can also save 10% on your engagement ring setting once you've picked a diamond. Engagement Ring Guru has partnered with James Allen to provide you with a unique 10% off any engagement ring setting coupon code. Just type in "ringgu10" during the purchase process and you'll get 10% off the ring setting price (doesn't include the diamond).
