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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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QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico

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Home > MINERALS > PRECIOUS AND SEMI-PRECIOUS GEMSTONES
 
QUARTZ AGATE 'COCONUT'

Las Choyas Geode Mine, Chihuahua, Mexico
 
Geodes are hollow rocks lined with crystals of various minerals and one of the world's largest and most famous deposits of geodes occurs at Las Choyas in Mexico where they are mined underground. They are often called coconut geodes due to their size and shape.  
 
The geodes were originally cavities in rhyolite volcanic lava (also called ash flow tuff) deposited during the Eocene period about 40 million years ago.  The cavities were subsequently infilled with quartz by percolating groundwater which takes the form of agate and/or sparkling crystals. 

 
In this example the agate has completely filled the cavity. It has been cut and polished to show the extremely fine agate banding. 
 
A four-pronged acrylic stand is included.
 
Click on a picture for a larger image


Size:   4 x 9 x 9 centimetres
Weight:  500 grams ​​

PRICE: £25.00
QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico
QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico QUARTZ AGATE 'COCONUT' - Chihuahua, Mexico