What do you think about a 3ct, F, excellent cut round stone being SI2? I could only see inclusions with the loup, not by naked-eye. Yet, one jeweler said SI2 is too low of a level for a 3ct stone. Is she just trying to sell me a better stone, because I figure if it can only be seen under 10x magnification than who cares! Could someone notice SI2 inclusions with their naked eye on a 3ct?