In regards to following,
Emerald: very strong bluish green to green, tone 3 to 8, saturation 2 to 5. Top color: vstbG 5/5; bG 5/5 or 6/5; vslbG 5/5
Green beryl: slyG 4/3
Morganite: slpR 3/4
Heliodor: Y 4/4
How do I determine the stone in exam is which quality in above?
Your professional advice appreciated