Tanzanite - Arusha, Merelani Mountains, Tanzania
 ex collection Robert Scheck
 
 This approx. 2 cm large tanzanite crystal shows all the properties of the rare zoisite variation. Although detached and recrystallized on the back, the front shows the multi-faceted crystal shape with good lustre. The crystal has a flawless transparency and, apart from a few stress cracks, best gem quality. The characteristic dichroism which moves between intense royal blue and violet is very well developed on this untreated piece. Historic find from the mid-1980s from Robert Scheck's collection.