A small nodule above the blue tourmaline. Showing the brown oxidised surface.
|Mineral class||Phosphates : Vivianite - Skorodite - Triplite group|
|Habitus||As nodules and lumps.|
|Color||Dark red, silky to matte. Often with a brown to black surface of oxidation products.|
|Luster||Silky to matte.|
|Description||Heterosite is an oxidation product that represents the end member of the serie triphylite - ferrisicklerite - heterosite. It's the iron rich analog to purpurite.|
|Notes|| The brown tarnish is easily removed with hydrochloric acid.
Be careful, or you will ruin your sample.|
Occurs often as irregular aggregates.
|Locations|| A rare mineral in Sweden. |
| To phosphates index.
|| Mineral group index.
If you have some questions, suggestions or comments you are welcome to write me a line or two.