molysite

molysite

[′mäl·ə‚sīt]
(mineralogy)
FeCl3 A brownish-red or yellow mineral composed of native ferric chloride, occurring in lava at Vesuvius.
References in periodicals archive ?
10 NATURE, Garlaschelli and two other Italian researchers propose that medieval alchemists could have created a thixotropic substance that looked like blood by mixing water and salt with a mineral called molysite.