Leptochlorite

Analysis I is incomplete, but analysis II may be readily recalculated into leptochlorite made up of mixtures of the following moleculas in the proportion indicated […]

[…] contemporaneous with gold are gilbertite, leptochlorite, tourmaline, iron sulphides, feldspar, (rare) carbonates, and quartz; post gold minerals are quartz, zinc and lead sulphides, and many others of geophases K and L.

The reduced, bivalent iron partly migrates and partly becomes fixed in the form of leptochlorites or siderite.