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BOROLANITE - Kincardine, Scotland

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Home > MINERALS > UNUSUAL ROCKS AND MINERALS - WEIRD AND WONDERFUL !

 
BOROLANITE
  
Loch Borralan, Kincardine, Scotland
 

Borolanite is one of Scotland’s most unusual rocks. It is found in a large plutonic igneous intrusion known as the Loch Borralan Complex.

  

The intrusion consists of an exceptionally diverse variety of alkaline rock-types in a complex tectonic setting. They range from light-coloured rocks called syenites, made up mostly of potassium feldspar, to dark varieties rich in mafic minerals such as pyroxene and garnet. One intermediate variety is so distinctive it has been given its own name, borolanite (from an old spelling of the name of the loch).

   

Borolanite is a white-spotted nepheline syenite, consisting of white patches (mostly potassium feldspar) in a matrix of darker minerals such as feldspar, nepheline and pyroxene. In overall colour it is intermediate between a granite and a gabbro.

  

This is a very nice sample, it has a flat base and sits upright for display.

   
Click on a picture for a larger image

Size:  7 x 7 x 2.5 centimetres
Weight:  161 grams

PRICE: £16.00
Sorry, this item has been sold or is out of stock