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Lightning Stones
  
  Index -> Micros & Macros - Images of Minerals
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R Saunders




Joined: 28 Jul 2018
Posts: 52
Location: Michigan


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PostPosted: Sep 21, 2018 09:13    Post subject: Lightning Stones  

Lightning Stones
These are Septarian Nodules locally called Lightning Stones. They are found on beaches in the lower west side of MI. These were found in South Haven, MI. They consist of clay cemented onto an iron mineral called siderite. These concretions form in part through bacterial activity. They become fractured and the fractures fill with calcite brought in by ground water. The results forms lightning like patterns on a dark background.

I have ground and worked the large one at the top right.



20180331_122405.jpg
 Mineral: original at top right.
 Dimensions: 7.8 cm x 5.0 cm
 Description:
 Viewed:  901 Time(s)

20180331_122405.jpg



20180918_192312.jpg
 Mineral: ground and polished
 Description:
 Viewed:  894 Time(s)

20180918_192312.jpg



20180918_192403.jpg
 Mineral: change of lighting. preferred image.
 Description:
 Viewed:  898 Time(s)

20180918_192403.jpg


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