PARACELSUS

In his Book Of the Signature of Natural things.

The Tincture of Naturalists, is a, true sign, that by the transmutative virtue thereof, all imperfect Metals are changed, viz. the White into Silver, and the Red into the best Gold, if an exceeding small part of this Medicine well prepared, be injected upon the Metal, while in flux in a Crucible, &c.

The same.

For the invincible Astrum of Metals overcomes all things, and changeth into a Nature like it self, &c. This Gold and Silver is more noble, and better, than those, which are dug out of Metallick Mines; for Medicinal Arcanums to be prepared therefrom.

The same.

Therefore, I say every Alchimist, which hath the Astrum of Gold, is able to tinge all Red Metals into Gold, &c.

The same.

Our Tincture of Gold hath Astrums in it self, is a Substance most fixed, and in multiplication immutable. It is a Powder, haveing a colour most red, almost like Saffron, yet its whole Corporal Substance, is liquid as Rosin, perspicuous as Crystal, brittle as Glass, of the colour of a Rubie, and exceeding poaderous, &c.

Also read Paracelsus his Heaven of Philosophers.