Photomicrograph by Bilal Mahmood, magnified 58x.
Relics of native copper highlight the source of copper found encased in this Brazilian Paraiba tourmaline from the original area near São José da Batalha.
The research was published in the The Journal of Gemmology, Vol 36, No 3, pp 203.
Check it out below!
For a PDF of the full article, please click here!
