Ochtendung, Eifel region, Germany
Olivine is a name for a serie between two end members; Fayalite and Forsterite. Fayalite is the iron rich member, Forsterite is the magnesium rich member.
The Olivines have a very high melting point, thats why they are one of the first minerals to crystallize from the magma. Fayalite is a rare mineral at the Wannenköpfe, tabular form, mostly brown coloured.
Accompanying minerals in mine specimens: tiny Hematites and Sanidine. Sometimes it is difficult to say whether it is Forsterite or Fayalite. Mixed crystals are possible.
Characteristics: dark brown colour, often lengthstripes, they look a bit raw-rough.
Bulkemstraat 22 6369 XW Simpelveld The Netherlands
the quarry |
the xenoliths |
the minerals |
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