Learn · Diamonds
Diamond clarity map
Every clarity characteristic GIA defines, placed inside a round brilliant you can turn, and plotted the way a grading report plots them. Then see how size, number, location, relief and nature change a characteristic's effect at 10× magnification.
Pick a characteristic, then change its size, number and location to see how it affects the grade.
Read the guide
Six-prong solitaire, taken apart
A solitaire ring in 3D: its parts, and how proportions change the cut grade
Diamond colour, D to Z
One diamond moved along the D-to-Z colour scale, face-up and in the grading tray
Diamond fluorescence
None to Very Strong under the lamp, and what research found about daylight
Fancy shapes and the bow-tie
Stretch a fancy shape and see where light leaks and the bow-tie appears
Lab-grown, step by step
How CVD and HPHT diamonds are grown, step by step, and how labs tell
How to read a lab report
Each part of a laboratory report explained, on an example report