Vivianite has been used as a pigment since antiquity, and is also known as Blue Ocher. This grey-blue mineral was christened 'Vivianite' after Welshman John Henry Vivian 'discovered' it in Cornwall, England. Vivianite is often found in peat bogs, where it grows on (and will eventually replace) the bones and teeth of animals (or humans) found within. This mineral pigment adds a beautiful luminous quality when used for glazing.
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