Could any blood be seen on the table?

When Solange cuts her finger, it seems to be bleeding. When she leaves, Dr. Joyce goes over and looks carefully where she was sitting. I'm not sure if I see any blood there or not. After he leaves, the butler Jonathan also notices. I couldn't see any blood. Can anyone tell if there is blood they are looking at? Or were they surprised there was no blood?

"Cum Grano Salis"