- Pyrite Ps. After Pyrrhotite With Sphalerite & Quartz
- Potosi Mine, Santa Eulalia, Chihuahua, Mexico
- Cabinet, 10.4 x 7.9 x 6.5 cm
- Ex. Richard Heck
Four species on one specimen, with style! Here we have elongated crystals, to 2.8 cm in length, of finely crystallized, splendent, brassy yellow pyrite which have pseudomorphed (replaced) elongated pyrrhotite crystals. though the form is unusual, both the form for pyrrhotite and this replacement is well documented at this locale, and considered an old classic find. These are perched, along with lustrous black crystals of sphalerite to 3 cm across, on milky, translucent quartz crystals to 4 cm in length. All are of high quality and stick out in different directions like they were stuck into a pincushion, making this a very 3-dimensional specimen.