[Rockhounds] 18 sided Beryl crystal

[Kreigh Tomaszewski]

I have a small 12 sided crystal from the same locality that is a twinned
crystal, and the faces are pretty close to being even. Your's looks more
like a group of crystals that grew together, but not quite in the same axis
alignment.

On Tue, Mar 5, 2019 at 2:47 PM <larryrush at att.net> wrote:

> I acquired this piece many years ago, in a trade. It may be described as a
> hexagonal tripyramid (?). Although it does have 18 prism faces, few are of
> the same width, and the symmetry is not obvious or easily defined.  The
> locality is the Mc Ginnes Mine, Wentworth, Grafton Co., NH, noted for these
> unusual beryls. It is 2X3X13 cm in size, and has no terminations.
>
>
>
> I got it due to its unusual habit, and would appreciate any comments that
> help to define it, crystallographically.
>
>
>
>  <https://www.irista.com/gallery/sdsy1wlie6l5>
> https://www.irista.com/gallery/sdsy1wlie6l5
>
> Larry
>
>
>
> Larry Rush
>
> BS Geology
>
> ConnRox Minerals
>
> Guilford, CT
>
>
>
>
>
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