"Norbert Kern" <nor### [at] t-onlinede> wrote:
> William F Pokorny <ano### [at] anonymousorg> wrote:
>
> > Very nice. Reminds me of diced computer chips/silicon - less the stacked
> > arrangement.
> >
> > Bill P.
>
> In fact I had an old 8 cm silicon single crystal in mind. And heat-coloring is
> nothing but a iridescent thin metal oxide layer on metal - a semiconductor.
>
> Norbert

It actually looks a lot like bismuth crystals - such as one might find at a
museum gift shop.

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