| Description |
|
| Comments: | Occurs in the graphic granite zone of the pegmatite. Tiny cyrtolite zircons sometimes found between biotite laminae. |
| Habit: | Hexagonal books to 2 cm in thickness, 10 cm in girth. |
| Colour: | Black, Golden (when weathered) |
| UV Fluorescence: | None |
| Quality of samples: | not specified / average specimens |
| Rarity at site: | Common |
| Confirmation |
|
| Validity: | Confirmed |
| Confirmation Methods: | Visual Identification
|
| References |
|
| References: | Self-Collected by Franklin Roberts |
| Data |
|
| Mineral Data: | Click here to view Biotite data |
| Locality Data: | Click here to view Undisclosed pegmatite locality, Burnet Co., Texas, USA |
