Beach Stones with White Lines 1 – Natural pattern of crystalline calcite-filled cracks in a beach stone derived from the inner core of a Birchi Nodule from the Shales-with-Beef Member of the Charmouth Mudstone Formation of the Lower Lias in the Jurassic Period at Charmouth, Dorset, England. This kind of stone is also known as a septarian nodule.
Jessica's Nature Blog 
A wonderful abstract
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Thank you, Judith. Some of the patterns in these stones are intriguing and suggest natural abstract art or even primitive cave art.
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I have just visited your site but wasn’t able to leave a comment there. I looked at your abstract seascapes and landscapes – they are terrific, wonderfully inventive, and beautiful.
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