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PORPHYRY BASALT (CUT AND POLISHED) - China

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

 
PORPHYRY BASALT
  
Cut and polished slice
  
Hunan Province, China
  
Conspicuous crystals of feldspar in basaltic lava. The crystals formed as molten rock cooled slowly in a magma chamber. Rocks like this that have large crystals in a groundmass of very small crystals are called porphyries, and the adjective porphyritic is used to describe them.
  
In some varieties of this rock the feldspar crystals are long and thin, and their distribution in the rock resembles Chinese characters. It is known as Chinese writing stone.
  
This is a lovely decorative slice, polished on all sides. Presented in a lidded gift box.
  

Click on a picture for a larger image

Size:  9.5 x 6.5 x 0.8 centimetres
Weight:  115 grams


PRICE: £18.00
PORPHYRY  BASALT (CUT AND POLISHED)  -  China
PORPHYRY  BASALT (CUT AND POLISHED)  -  China PORPHYRY  BASALT (CUT AND POLISHED)  -  China PORPHYRY  BASALT (CUT AND POLISHED)  -  China PORPHYRY  BASALT (CUT AND POLISHED)  -  China