What all is required for mandala art?

I'm curious about the requirements for creating mandala art. Could you elaborate on what materials, skills, and perhaps any other essential elements one needs to embark on this artistic journey? Is there a specific style or technique that is universally followed, or does it vary widely based on the artist's preference and cultural background? Additionally, are there any rituals or ceremonies often associated with the creation of mandalas that one should be aware of?