I have been working on cataloging, organizing, and photographing the micromount collection that was made for my grandfather by Don Cooke. This is a nice little (well every specimen in this collection is little) Brochantite from Eureka, Utah. The main crystal is about 2mm long. More images of the specimen can be found here: https://imgur.com/a/QGUqBfM

I will try and share some more images of the collection in the next few days.