Here is another try with the new micro lens.
This is a 4 mm royal blue sapphire (0.33 ct.) with good color saturation. I chose this one, because I purchased a certification with this stone, which I will include for fun.
Here is the certification :
Here is the stone:
So what do you think of the sapphire? It's hard to get this much color in a 4 mm stone!
:)