A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Tourmaline from Minas Gerais, Brazil |
|---|---|
| Description | Tourmaline comes in many varieties; all are complex ring-silicate minerals that contain boron. The black variety is known as schorl, and has composition near NaFe3(Al,Fe)6Si6O18(BO3)3(OH)4. This sample from Minas Gerais, Brazil, is about 8 cm tall. |
| Location | Brazil ▹ Minas Gerais |
| Photographer | Mike Davis. 2001-03-20. |
| Collection | University of North Dakota Mineralogy Collection. |
| Key words | tourmaline, brazil, schorl |
| Tech details | 303 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 199 |
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