Colin Hutton (1910-1971), identifier of hydrogrossular garnet. Source: https://teara.govt.nz/en/photograph/9088/colin-hutton-mineralogist
c o hutton 1
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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)