It is certain that all Granates or Marbles, the red, black, ash-coloured, duskish, also of whatsoever colour they are, or wheresoever they are found, whether in Brooks or Rivers, or in Sand, or fat Earth, or in high Rocks, do always contain much of Gold, but that by reason of their glassy nature, they cannot be tamed by Aq. fortis’s, and by reason of their most difficult fusion cannot be wrought by Saturn or Lead; for that cause they have made none partaker of their gold, and they have been neglected as unprofitable earths, whenas notwithstanding they being handled by little labour, they are able to afford much gold.
Some one therefore may ask, because they cannot be subdued either by lead or Aquæ fortis’s, what course must be taken, that gold may be extracted out of their bowels? I answer. and also by a Fusible they may be so overcome, that the gold which they have may be withdrawn from them with profit, for because they can bear the fire, they are and perform by a double labour, one through their sharpness, and another by reason of a strong fire, so that nothing is safe from so great forces, but all things are constrained to yield unto so great violence. Hence they do willingly afterwards enter the Salt of Lead, and in time of melting do readily draw out their gold.
XLVIII. A most firm demonstration, that sharp Waters and Salts after the manner of the ways hitherto described, do draw forth more Gold and Silver as it were without cost, out of Mines or Minerals containing Gold and Silver, than sumptuous or costly melting Fires.
It is not unknown to every one that is seasoned but even with a mean knowledge of gold bearing Mines, that without the addition of Lead or other flowable things, Gold can in no wise be melted out of them, whenas therefore there is little Gold in those, and nevertheless much of Lead or other matters is required to be added for an easie fusion or melting sake, who shall be fit for the undergoing of so great costs? Hence it hath come to pass that such poor minerals could bring nothing of profit in common.
It being also granted, that there is so much of Gold and Silver in Minerals, that they will defray the charges of fire and fusion, and afford Gold and Silver with profit, yet such operations are not comparable to my inventions using Waters and Salts, no more than as Water to Wine, or Night to Day.
For first, fusion or melting far exceeds in its costs the extraction which is perfected by Salt and Waters. And then it can never be brought to pass that fusion should expell all the Gold and Silver out of Mines and Minerals, but leaves some thereof in the drosses, next also there is made a loss of all the volatile Gold and Silver, which are cast forth by a most strong fire, and driven away into the air; on the contrary, of the more ample and wealthy profits, which the extraction of Gold and Silver out of Minerals bringeth, this is not the least, that not onely all the Gold and Silver which is fixed, is drawn out without any detriment or loss, but also those two metals being as yet volatile are extracted at once and made fixt and constant in the fire, whenas notwithstanding by the vehemence of a melting fire, they are wholly dispersed and reduced into nothing. For the Waters of Salts do fix the volatile fugative spirits of Gold and Silver, the which by the vehement blasts of Bellows, are rendred as yet far more volatile, so that by the help of fusion scarce half the Gold is gotten which the extraction by the Waters of Salt affordeth.
Add to this, that not onely all the Silver and Gold, as well the volatile as the fixt is gotten together without any loss, but also the charges of Coals are far less, and one operatour may perform as much of this extraction of Gold and Silver, as three in the labour of fusion or melting.
From hence it is easily to be seen, how much profit and fruit may be gained by this my most excellent invention in all places of Germany. For this extraction is not onely for extracting Gold and Silver as well out of rich as poor Mines, but also snatcheth out all the Gold and Silver, in Flints tinged with any colour, wherewith all Brooks, Rivers, and Fields are filled.
Now follow some particular transmutations of the imperfect Metals into more perfect ones, by common fire, and Crude Salt, and by the not common con-centred moist fire of Salt.