Chrysocolla, Desert Rose, Pyrite

I have some new rocks that I picked up at the giftshop during my trip to the zoo yesterday. I got Chrysocolla, Desert Rose, and Pyrite. I can't really seem to find a whole lot of information on them online, so I was hoping someone here may be able to tell me a little more about the rocks I picked up. Also, your experiences with them. Thank you so much!

Desert Rose is one of the four forms of Gypsum (Selenite is another) ~ associated with the Crown Chakra ~ is useful in personal meditation & visualization; helps to clarify your innermost thoughts; assists in strengthening decision making.

Pyrite, known as Fool's Gold, forms in a cubic shape ~ a protective stone, blocking or shielding you from negative energies from people, places and things.

Chrysocolla, associated with the Throat Chakra ~ Healing, Power, and Love.

Pyrite is often twinned (two cubes smooshed together) and dodecahedral (10-sided). I love pyrite but it often makes my fingers black because of the lead.