Welcome to the deepest rabbit hole you'll probably ever go down :)

The Rosicrucians are complicated. A lot of individuals and groups have claimed to be associated with them or even members, but they had nothing to back up the claim. One famous occultist claimed that anyone who says they're a Rosicrucian, isn't.

I was a bit dismayed that the person who had the Georgia Guide stones made had highjacked the name Christian Rosenkreutz (sp?), the legendary founder of the ORC. Not sure what to think of that. Were they made on behalf of the Rosicrucians, a group who stole the name, or is it just to throw off investigators?

As for the GWB, I'm definitely not convinced by the website of Bob Sanders, but to be fair, I didn't spend a lot of time on it and that was a few years ago.

The Philosopher's Stone is both spiritual AND material, from what I've researched. I've experimented with the stages of alchemy, but soon realized Paracelsus was right: "before one can transmute lead to gold, one must first transmute thyself" (or something like that). In alchemy, assume nothing literally, and different alchemists used identical terms but with different meanings. Discovering the prima materia is one of the greatest occult/alchemical mysteries. Some have deduced that it's urine (that is, urine is the key to producing the Philosopher's Stone). I never produced the PS, but alchemy did get me into making tinctures that have been beneficial: lemon balm, green tea, rosemary, lavender, chamomile, burdock root and more. Even tried to extract psilocybin from shrooms, but that one failed.

Lots of books on spiritual and practical alchemy. Many modern alchemists claim that The Golden Chain of Homer is the greatest book on the subject out there. It explains how and why alchemy works. The Alchemist's Handbook by Frater Albertus, and Real Alchemy by RA Bartlett are excellent reads. All these books are available on amazon.

If you keep going down the rabbit hole, always have Christ on your mind and pray for guidance. Even with angel magic you could find yourself communicating with something manipulative and not who you think you're speaking with. There are a lot of wrong turns that can take you to dark places, and there are entities that will try to direct you down that path.

Have fun!