[Geology2] Re: Greenish rock with veins of green "glass"

--- In geology2@yahoogroups.com, "coyote272" <coyote2@...> wrote:
>
> It's light green, and had several deep veins of (what looks like) green "glass" inside it.

The whole sample is glass--technically. But in this case this appears to be silicate slag from a smelting operation. Someone else was thinking of trinitite.

BTW Serpentine is NOT volcanic-- it is metamorphic and it is not glassy.

Eman

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