[Rockhounds] Blue/green Apophyllite question

[Kreigh Tomaszewski]

The significant change in color and crystal form/habit makes me wonder
if there is a fundamental change in the physical structure from some
subtle replacement that would make this a new mineral. Odds are it is
just a varient of Apophyllite, but I am curious as to what makes the
differences from what is usually found at the location.

Kreigh




Kitty & Bill Heacox wrote:
> 
> A lot of people skip right over something with AD in the topic, so I
> thought I'd re-submit Larry's post without that, and give the link
> directly to the page with the unusual apophyllite.  I'd be interested
> in any mineralogists' comments too.
> 
> http://www.connroxminerals.com/India.html
> 
> Aloha, Kitty
> 
> At 09:32 AM 10/20/2007, Lawrence Rush wrote:
> >I recently got a dozen pieces of an unusual blue-green variety of
> >Apophyllite. Although these are from Jalgoan, India, they do not
> >look at all like the usual blocky form of Apophyllite from there.
> >These are different in color, and are arranged in a parallel habit,
> >with the prism being elongated and frequently twinned. Apparently
> >they never occur as single crystals.The matrix (Natrolite) is
> >mamillary and stalagmatitic.  My Indian friend who sends me minerals
> >from there says that these are occasionally found there and prized
> >by the miners for their color and gem-like appearance.
> >
> >I would appreciate any any comment on these odd crystals from any
> >mineralogists in the group (and also anyone interested in buying
> >any, of course!).
> >
> >Larry
> 
> --
> _______________________________________________
> Rockhounds at drizzle Mailing List
> Subscription Services:
> http://lists.drizzle.com/mailman/listinfo/rockhounds
> List Home Page, with a link to the List Usage Policy:
> http://www.eclecticlapidary.com/Rockhounds/index.html