Grey banded argillite from vicinity of Gemstone Beach. Found in March 2022. https://tumblestoneblog.wordpress.com/2023/03/31/southern-sojourn-202333-four-hour-fossick-gemstone-beach-te-waewae-bay-friday-31-march/
05a March 2022
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A Blog About Stone Gathering, Tumbling and Polishing, and Rocks and Landscapes, from New Zealand – With Musical Interludes (john.tumblestone@gmail.com)