Same slab of petrified Oregon sycamore, after polishing and bleaching. Source: https://forum.rocktumblinghobby.com/thread/88041/bleached-sycamore
rtf sycamore after sn
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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)