What is the best position to place the cave stone in your home?

Put the cavestone wherever you think it will look good, as long as it is convenient and the design is reasonable. This is your heart's desire. How others behave is their own preference, and whether others behave well has nothing to do with you. I have been doing Feng Shui for many years, and my experience is that geography and orientation design do not have a priori properties, but they do have a posteriori properties. For example, no matter how good a Feng Shui master is or how reasonable you are about your stone, it is absolutely impossible for you to do whatever you want. But if after you place it and then use Feng Shui to test it, it is in the most reasonable position, then you must have succeeded in some way. This is what Feng Shui theory can only test: the way you think and act, your thoughts determine the success of your actions.