It flows like water, yet it makes no wet; it is of great weight, and is small." Philalethes says, in _A Brief Guide to the Celestial Ruby_: "The Philosopher's Stone is a certain heavenly, spiritual, penetrative, and fixed substance, which brings all metals to the perfection of gold or silver (according to the quality of the Medicine), and that by natural methods, which yet in their effects transcend Nature....

Know then that it is called a stone, not because it is like a stone, but only because, by virtue of its fixed nature, it resists the action of fire as successfully as any stone.

In species it is gold, more pure than the purest; it is fixed and incombustible like a stone, but its appearance is that of very fine powder, impalpable to the touch, sweet to the taste, fragrant to the smell, in potency a most penetrative spirit, apparently dry and yet unctuous, and easily capable of tinging a plate of metal....

If we say that its nature is spiritual, it would be no more than the truth; if we described it as corporeal, the expression would be equally correct." The same author says: "There is a substance of a metalline species which looks so cloudy that the universe will have nothing to do with it.

Its visible form is vile; it defiles metalline bodies, and no one can readily imagine that the pearly drink of bright Phoebus should spring from thence.