Rose Calcite

Rose Calcite

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

Brittle Starfish

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

Middle Devion period

These pieces of cuboidal fluorite crystals in varying shades of dark green occur on a high contrast white-gray matrix

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

There are 5 on this plate for reference of what they look like

with color intensity usually deepest at the termination or tip of each crystal

from the Cambrian age

With a dazzling array of colors and crystal structures

The famed “fool’s gold”

where some truly impressive specimens like this very rarely emerge from the mines