Fluorite Phantom Sphalerite which over the course of

which over the course of millions of years becomes solid while retaining the semitransparent yellowish hue of tree sap

and when exposed to the elements over a long period of time can change into the closely related malachite

The spectacular display of colors these specimens display can be formed by two different geological processes: the oxidation of pyrite causing ultra-thin layers of iron oxide to form on the surface

large calcite crystals and the dusting of fine gold from the pyrite is unique to specimens from this specific region of China and have not been found anywhere else

but most specimens have vivid color due to various impurities and are often fluorescent

Fluorite Phantom Sphalerite which over the course of