This is Pepper with her one lone tiny, tiny baby boy. 
 Her eyes show very green, but her coat is very hard to manage, quite thick and grows like a weed( or like a spring flower). She weighs 10 lbs. 
 I love this big  girl but dont like the coat. Its soft with very little shine except in a picture.
 .........But I have two of her sisters.......they are much smaller then Pepper......less then half her size and their coats are silk. Not sure what to think of the theory.........but I do know ancestory plays an enormous part in the equation. Maybe eye reflection is sign?!...........
 
         Reflection of the eyes does not always hold true to the present yorkie. It can be pretty accurate but its absolutely not 100%.