Oh my. I just opened it, and it talks about a person's Aura. All my life, I can look at a person and see a color around them.
Another one of those gifts was being able to hold my hand out over a person and feeling "hot" spots where they were ill. I would do message to help open those areas and allow blood flow to that spot to help heal them.
I wish I could readily see auras. I actually can sense auras, if I have a mind to. My own is rather larger than "normal" due to tramas... about 10 feet.
I do have some holistic friends who are convinced I am a medical intuitive as I can at times see illness "coloring a persons face". A friend who is a professional medical intuitive sees in black and white, and for several years I would describe the "color" of various peoples faces... my own, my families, clients, people who came into the store. She asked me to tell her the colors I see and what they meant to me. When I did, she remarked that she only saw black or white. Only when I left the store did I realize what she had subtly suggested to me. Later she suggested that I picked up on people in my aura bubble most likely as a way to sense safety and that the "gift" just came along with it though it is largley unconscious and does not work on everybody. She offered to train me and I declined.
When I was 16 I went to a seminar where I learned alpha, and theta meditation as well as "glove anesthesia" which is not only detecting hot or cold spots but sending heat or cold through your hands. Sort of like what you describe Safe Now. I was asked post seminar to train and declined.
Later on I had a friend interested in becoming a Reiki Master and she offered in return for me being her "subject/client" for sessions to give me heavily discounted Reiki 1 and 2 training. During the practice portion of the seminar and in the sessions I see colors of the practitioner working on me, but not on anyone else. Though I demonstrated other aptitudes. She too asked me to train and I have declined.
Several others at one time or another have offered mentorships to train me... but I have no interest, as the amount of concentration always gave me headaches or other unnecessary difficulties.
Thinking about it now, that is probably why I didn't feel the need to use stones or other objects. Though I don't actively "do" any of the things in this post... except for the seminar at 16 or the Reiki classes. Even when I learned Reiki, when everyone else was drawing symbols on their hands... I never did but I would accomplish the same things as well or better intuitively. I guess that's why I don't do or seem to need rituals.
Off topic, I'll shut up now.