Illustrated is a close-up of the interior of an Oribe Mizusashi by Kakurezaki Ryuichi apprentice; Ishii Takahiro. The interior, truly highlights the rich diversity that a copper glaze, in this case an Oribe, is capable of. Though only one glaze, as the glaze matured and pooled into the bottom of the interior, it has gone from a rich, translucent grassy green to an opaque boundary of blue-green with black spots being formed by the build up of high concentrations of copper forming black metallic crystals. The opaque blue-green has also created an effect reminiscent of pine-needles floating about the surface. In terms of any Oribe glaze, I don't think you could have asked for more diversity and testament to the possibilities of using copper.
For anyone interested in learning more about the elements, I would suggest watching this short video.