Staurolite
| ID | 137 | |
|---|---|---|
| Mineral | Staurolite | |
| Location | Keivy Mountains - Russia | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Staurolite information at mindat.org |
|
Mindat data
| ID | 3753 |
|---|---|
| Long ID | 1:1:3753:8 |
| Formula |
Fe2+2Al9Si4O23(OH)
|
| IMA Status |
0 1 |
| Other Occurrences | Amphibolite grade of regionally metamorphosed pelitic rocks. |
| Discovery Year | 1792 |
| Diapheny | Translucent |
| Cleavage | Distinct on {010} |
| Tenacity | brittle |
| Colour | Dark brown, brownish-black, red-brown |
| Hardness (min) | 7.0 |
| Hardness (max) | 7.5 |
| About the name | From Greek "stavros", cross, alluding to the cruciform twins it displays in some cases. |
| Streak | White to grayish |
| Crystal System | Monoclinic |
| Cleavage Type | Distinct/Good |
| Fracture type | Sub-Conchoidal |
| Morphology | Prismatic crystals |
| Twinning | Commonly 60-degree twins on {231}, may be cyclic. Less commonly 90-degree cruciform twins on {031}. On (320) (very rare). |
| shortcode_ima | St |
| Group | Staurolite Group |
Details
Price: € 15
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Al | Aluminium | |
| Fe | Iron | |
| H | Hydrogen | |
| O | Oxygen | |
| Si | Silicium |