Sandwich Calcite Ammonite These incredible specimens of natural

These incredible specimens of natural uncut aquamarine from Mount Little Xuebaoding in Sichuan

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

fluorite specimens have been prized since ancient times and are now among the most popular minerals in the collecting world

This naturally occurring form of relatively common pyrite remains highly sought after by collectors as a specimen or for use as a gem or in jewelry

and is one of the more common gems although pieces of exceptional hue and clarity are considered fairly rare and can be extremely valuable

Sandwich Calcite Ammonite These incredible specimens of natural