That's exactly how I was. The discussion sort of went off topic and wasn't all that interesting to me. I haven't been able to see their auras since that day a week or two ago. As for some of my questions. The colours given off by non-living objects vary with the colour of the object.
Clothing blocks the aura.
This yellow varies in intensity according to the degree of mental activity. Maybe the student you observed was really on the ball that day. How to see the Aura To see the aura you have to be able to relax and concentrate, at the same time, and there is a trick to focusing the eyes in a special way. You need soft light to train in, not dim, but good soft light. Get a book and cover it in Blue or Red paper.