This specimen has beautiful crystallization and has not been cleaned in anyway. 

What is so very special with this specimen is, it appears to have a coating of opal-AN, which does give the piece a bit of a snow capped feeling.

The Opal-AN I found to be phosphorescent when using a UV laser, in normal uv lighting, both longwave and shortwave, it has a dim red fluorescence, so hard to see the phosphorescence but the UV laser, brings this to life. (video available upon request)

Even without this light effect, the specimen is amazing on it's own.