Twin crystal between almandine in schist.
Twin crystal with almandine in schist.
Staurolite and almandine in a compact mass.
|Mineral class||Silicates : Nesosilicates : topaz - staurolite group|
|Habitus||Often as short prismatic crystals with twins. Also as grains in some rocks.|
|Cleavage||Distinct, fracture uneven to subconchoidal.|
|Color||Dark brown , yellowish brown to black. Often with transformed surfaces.|
|Streak||Colorless to grayish.|
|Luster||Vitreous to resinous.|
|Description||Forms at regional metamorphose at high pressures and temperatures.|
|Occurance||In gneiss, mica schist and quartzites.|
|Associates||Kyanite, muscovite, garnet, quartz.|
|Notes||Varieties with traces of manganese is fusable.|
|Locations|| A rather common accessoric mineral |
| To silicate index.
|| Mineral group index.
If you have some questions, suggestions or comments you are welcome to write me a line or two.