ANSWER - Witches in general disagree on the definition of what makes a person a witch. Some believe witches are born and not made, others believe there must be a formal transitioning period before a person can call themselves a witch, yet others believe that the term “witch” is defined by behaviour, so anybody who chooses to practice witchcraft is a witch. I can tell you now, you will never find a definition that is agreed on by everybody!
My own personal view leans toward the idea that a witch is a person who practices witchcraft. I see the term as a descriptor of what somebody actually does rather than what someone claims to be. I know a few types who dress up, call themselves a witch and aimlessly wave a wand or two around but that isn’t witchcraft. Being a witch is about incorporating the craft into your everyday activities and weaving witchery into every element of your life. So it depends on what you consider to be witchcraft. I personally take witchcraft to mean using magic, energy and will to bring about change. With this definition your natural medicine and crystal healing could certainly be considered good examples of working with the craft. It would follow then in my view that you would be a witch.
It’s also important to remember that there are different types of witches and many many different ways to practice. Having a preference for one type of magic over another does not make you less of a witch, it makes you an individual. And individuality in my opinion makes for a stronger witch than someone who just follows a textbook.
You’ll always encounter people with their own personal opinion on what makes a witch. Some of these people will be excessively dogmatic and try to impose their own definitions on you. My advice is to label yourself as you feel comfortable. If you believe that the work you do with nature and crystals makes you a witch, then you are a witch.