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FORTHCOMING EVENTS

   

The 'Virtual'

Festival of Geology 2020

Saturday 7th and Sunday 8th November 2020

Save the dates!​​​​​​​

  

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AMETHYST CRYSTALS (PART OF A NATURAL GEODE) - Brazil

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Home > MINERALS > DECORATIVE STONES FOR HOME OR OFFICE



AMETHYST QUARTZ

Part of a large natural geode

Rio Grand do Sul, Brazil
  
In Rio Grand do Sul, the southernmost state of Brazil, and in adjacent Uruguay, quarries produce amethyst crystals that occur lining large hollow ‘geodes’.  These were formerly gas bubbles in 130 million year old basalt lava that now forms the giant Paraná lava plateau.
  
This piece is a pale colour but nonetheless beautiful. It sparkles extremely well in reflected light.
  
An acrylic, four-pronged stand is included.
  
Please note:  The colour of amethyst has been known to gradually fade if exposed to bright light, and so exposure to direct sunlight is not recommended. However, If displayed in indirect, low-level lighting the colour will last a lifetime.  See the following article for more information:  
www.mindat.org/article.php/905/Amethyst+Specimens
  
Click on a picture for a larger image

Size:  17 x 12 x 6 centimetres
Weight:  1.222 kilograms
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PRICE: £28.00