Diameter of a round diamond

[kharmony]

How do you calculate the diameter of a round diameter? For example from these numbers:

Carat: 0.502
Color: J
Clarity: VS2
Depth: 61.3
Table: 57
Crown Angle: 34.7
Crown %: 15
Pavilion Angle: 40.9
Pavilion %: 43
Girdle: Medium to Slightly Thick Faceted
Polish: Ideal
Symmetry: Ideal
Culet: Pointed
Fluorescence: Negligible
Measurements: 5.10-5.13X3.13

 

[Swanky]

Measurements: 5.10-5.13 X3.13
the bolded is the diameter, those 2 #'s should be very close to each other or the stone won't be truly round. The 2 #s you posted are very good for shape as reflected it says Symmetry: Ideal

 

[kharmony]

Thank you. I've been fascinated by all I'm learning about diamonds by reading the forum.