Tourmaline (Tricolor) Miguel Romero George Robertson collection

George Robertson collection

The Rhodochrosite from this mine ranges in its chemistry from the far manganese end to an iron / manganese mix

Specimen # BOL711B52

but I don't know if I've seen a piece labeled as coming from the actual moraine of the glacier prior to this piece

Item #OPALIND246

Tourmaline (Tricolor) Miguel Romero George Robertson collectionTourmalines are one of the few gems that occur in natural bi color or tri color stones. This beautiful stone was cut from a crystal found nearly 40 years ago in Brazil. The stone shows a distinct pink color throughout the majority of the body of the gem, with a lively green color on the other end and a beautiful colorless thin "Achroite" zone in the middle. Tourmaline is classified as a "Type 3" gemstone, as inclusions are almost always present, and