Prophecy Stone / Z-Stone
Commercial name for a star-shaped pseudomorph of goethite after marcasite. Originally formed as marcasite crystals on the sea floor, later converted to iron hydroxides, mainly…
Tag: marcasite
Boji® Stones
Registered trade name for a specific type of iron concretion from Kansas, United States. Also called (Kansas) Pop Rocks. It is actually a rock, a…
Ascension stones
Commercial name for marcasite nodules. Are often offered as a pair of a male and female stone, much like Boji®Stones and Moqui marbles. The smooth…
Live session #17 Pyrite
Recorded live session in which I discuss the mineral Pyrite and show beautiful examples of it from around the world. Specimens from Spain, Peru, USA…
