In cleavelandite and quartz.
3 cm piece with biotite.
|Mineral class||Oxides : Rutil-cassiterite group.|
|Habitus||Often as short prismatic crystals. Also as small grains or banded fibric masses.|
|Cleavage||Poor, fracture subconchoidal to uneven.|
|Color||Black, but also yellowish and colorless. Translucent to opaque.|
|Streak||White to weakly brownish.|
|Luster||Adamantine, greasy on fractures.|
|Occurance||In pegmatites, high temperature hydrothermal veins and some metamorphic rocks.|
|Notes||Cassiterite is insoluble in acids and infusible.|
|Locations|| A rare mineral in Sweden. |
| To oxides index.
|| Mineral group index.
If you have some questions, suggestions or comments you are welcome to write me a line or two.