Multicolored Copper-Bearing Tourmaline in the Host Rock at the Quintos Mine (Rio Grande Do Norte, Brazil)
Fig. Par23,24,25,26 A detailed view of the primary occurrence of copper-bearing tourmalines in the host rocks at the Quintos mine (Rio Grande do Northe, Brazil). Photo taken in the underground tunnel. The tourmaline crystals are growing in sizes larger than pencils. The multicolored tourmalines show a purple core and blue rim. The grey and white minerals of the matrix are quartz and feldspar respectively. P. Wild Archive.
Multicolored Copper-Bearing Tourmaline in the Host Rock at the Quintos Mine
