Mica Cluster - Unique #2 Mica is a versatile mineral that is as beautiful as it is practical. It has many uses in professions such as electricity and painting. The specimen for sale has dark botryoidal mica and tiny flaky mica blades that sparkle under the light. There are also several veins of blocky aquamarine and some quartz crystals. This is a very interesting piece with varying mineral structures. Note: This product is fairly brittle and must be handled with care.