Pavillion Angles - Really critical

[PrecisionGem]

The pavilion angles are even more critical than the crown angles, where even slight changes can have dramatic effects.
This is the same design as the example I posted of the crown, this time I'll change up the pavilion angles.

The stone with the angles as I would cut it. The last tier on the pavilion is set at 39 degrees.



Now lets change the angle by just one degree to 40.



Notice the dark section in the center which is extinction, and also along the outside you see there is light leaking all around creating a area with no light being reflected back.

Now we will go the other direction and change the angle to just 38 degrees.



This time we get this donut effect of extinction, and some light loss around the outside.
Some of these issues could be helped by changing the crown angles to better work with the new pavilion angles.

The point here is, that very slight changes in the pavilion can have dramatic effects on the performance of the stone.

 

[elle_71125]

Thank you for the informative post. I enjoy reading these.

 

[OoohShiny]

Great examples of how critical angles are, thank you for posting

 

[MissyBeaucoup]

Goes to show that even if color is king, the cut is really important.