I discovered another crystal that turned out to be quite interesting. It's a very small quartz crystal cluster that had fallen out of a Moroccan geode a while back, when I broke it open. 
As you can see, this cluster is less than half the size of an American dime. Approximately 1 cm. Yet there are complex crystal structures even at this minute size. Actually the structures reduce down to the molecular level .
Image credit steemitimages.com
The exact structure is duplicated to a larger complex of the same structures bonded together.
To the naked eye this is a very tiny sparkly little cluster.
This picture was taken with zoom on a smart phone.
Take it to 10x on the stereoscope
My favorite pic is the following
The perfect natural facets on this particular crystal in the cluster allow for the prismatic effect you see here, very much like the faceting that is done to a diamond