Hearts & Arrows diamond

[se_song]

What are the technical specifications of a diamond to be called a true hearts and arrow?

 

[stone-cold11]

This.

https://www.pricescope.com/journal/hearts_and_arrows_diamonds_and_basics_diamond_cutting

Just optical symm, nothing on optical performance. You will need to see it yourself under a H&A scope as no lab is grading it except HRD.