TUSCON, AZ  – Among the unique qualities that make Tanzanite a much-sought after gem is its remarkable coloration, which changes from blue to violet to burgundy, depending on its crystal orientation. It is altogether fitting, then, that this stone lent its name to the “Tanzanite Stage” at the recent Gem and Jam Festival, which was held at the Pima County Fairgrounds. Aside from the procession of jam band stars that appeared... TUSCON, AZ  – Among the unique qualities that make Tanzanite a much-sought after gem is its remarkable coloration, which changes from blue to violet to burgundy, depending on its crystal orientation. It is altogether fitting, then, that this stone lent its name to the “Tanzanite Stage” at the recent Gem and Jam Festival, which was held at the Pima County Fairgrounds. Aside from the procession of jam band stars that appeared...