Magnesio-Axinite from Merelani, Tanzania
A rare find from a limited occurrence in Tanzania’s Merelani Hills, along with a “Merelani mint” garnet, is seen in Tucson.
Pyrope-Spessartine Color-Change Garnet with a High Grossular Component
A color change in rough garnet is observed and plotted in GIA’s Carlsbad lab.
Filled Calcite with Pronounced Phosphorescence
A sphere with a greasy luster exhibiting strong phosphorescence is investigated.
Mixed-Type Treated Red HPHT Synthetic Diamond
A fancy-color treated synthetic specimen is revealed to be IaA + IaB + Ib types.