A description of #Haüyne fluorescence at: https://gemologyproject.com/wiki/index.php?title=Hauyne

These samples are found in a quarry near the Laacher See (Eifel Mts, Rhineland-Palatinate, Germany)

This crater was formed only ~13,000 years ago in an eruption similar in size to the 1991 Pinitubo eruption -in central Europe!

#MinCup25 #hauyne #LaacherSee #EifelMountains #Germany #Volcano