Calcite or melted plastic

Along with the last ugly rock that I posted about: this piece was brought in.

To the naked eye, it again just looks like an ugly rock. Most people would just walk on by and not give it a second look.

But most people don't have a stereoscope:

This pic clearly shows calcite crystal in a cluster. However, as I was exploring this little treasure, I discovered that some of the crystals are morphed.

The crystals in the lower right appear to be melted

As I explored further, I found more.

This indicates the crystals formed in a volcanic vent. The heat was not extreme enough to burn or destroy the structures but did melt them.

In the lower left quadrant of this next photo you can see a tiny azurite crystal; indicating an extremely small presence of copper.

Pretty cool if you ask me.