The Fire Stone?

I came up to a document written by Basil Valentine regarding the so called "Fire Stone" which has the same powers and abilities as the Philosopher's Stone but less powerfull.It discribes it as being made using antimony and antimony trichloride etc. generally antimoney connected ingredients...so maybe Nick had discovered this stone instead of the Philosopher's stone?

Looks like Nick don't create this stone that haven't the same proprieties of the true stone. I read the text and the First "Fire Stone" it is made with antimony glass oil that is made with stibnite and niter.
Take care if you try it because can explode.

“Now, although there is so strict an affinity between Antimony, and Saturn; yet by reason of the too much Sulphur, which Antimony hath in itself, it is cast out from it: because its viscous Body (in it’s Nativity) could not come to perfection; and therefore it was constrained necessarily to consist among Minerals: because it’s abundance of hot Sulphur was the Cause, that hindred it’s Mercury, that through defect of Cold it could neither come to Coagulation, nor into a Malleable Body.”

“Yet the Stone of Fire tingeth not universally, as the Stone of Philosophers, which is made of the Essence of Gold itself. “
 
“Let the Reader consider, that there are many kinds of Stones found, which tinge particularly; but all fixed Powders, which tinge, I here signify by the name of Stones; yet one tingeth more highly then another, as especially the Stone of Philosophers, which obtains the principal place; the next is the Tincture of Sol; and of Luna. For the White: after these, the Tincture of Vitriol or Venus; likewise the Tincture of Mars; either of which hath in itself the Tincture of Sol, when reduced to Fixation. Next to these follow the Tinctures of Jupiter and Saturn for Coagulation of Mercury; and lastly, the Tincture of Mercury itself. This is the difference and multiplicity of Stones and Tinctures, all which notwithstanding are generated from Seed, and from one original Matrix, from which the true Universal Stone proceeds, but out of these no other Metallic Tincture is to be found.” Basil

yes I have heard of the "fire stone" before. I don't know much about it but from what I have heard it does not seem as if nick made the fire stone and mistaken it for the Philosopher's Stone.

I think this because nicks path towards what he labled the stone is quite different from the paths to the fire stone. from the very end of the process right down to the starting material or "prima materia".