...
Medium-grained (mL, 250-350µ), poorly sorted, subangular-subrounded
Sample |
|---|
...
number | Collector | Date of sampling |
|---|---|---|
heubeck0140 |
...
Collector:
...
Elisha M. Shemang, Botswana; Dept. of Geology, University of Botswana |
...
Date:
...
11.01.2008 |
Comments:
Mineral color in quartz is due to impurities of rutile, tourmaline or Fe-oxides intergrown
with the quartz crystal. Additionally, gas and liquid bubbles trapped during crystallization reduce
transparency
