Alert Level Two, Monday 18 May – Stone 3, Banded Argillite from Gemstone Beach

Most grey banded argillite stones found at Riverton and Gemstone Beach are similar to Stone of the Day Twenty-Four – the bands are well defined, with a straight boundary between them. Stone 3 of Alert Level Two is different – the lines between bands are wavy, almost like a water colour painting where one colour “bleeds” into another.

The cropped close-up images show that lots of tiny specks of different colours are embedded in the stone. The last image below also shows the start of two tiny cracks that run across the stop of the stone.

 The original and posted images of each side of the stone, showing the minor changes made for this Blog:

 

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Author: tumblestoneblog

Retired Academic, male, living in the New Zealand countryside near Whanganui with his wife as well as Jasper the dog, Fluffy the cat, Dancer and Penny, the horses, and a shed half-full of stones. Email john.tumblestone@gmail.com.

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