[Rockhounds] Garnet & Kyanite

[Axel Emmermann]

White kyanite may be fluorescent (yellowish white in LW and white in SW).

Axel

> -----Oorspronkelijk bericht-----
> Van: rockhounds-bounces at lists.drizzle.com 
> [mailto:rockhounds-bounces at lists.drizzle.com] Namens Carolyn Reynard
> Verzonden: dinsdag 6 november 2007 1:33
> Aan: Rockhounds
> Onderwerp: [Rockhounds] Garnet & Kyanite
> 
> Jim,   
> 
> Kyanite forms at a higher pressure and temperature than 
> garnet, so usually they are not together. There are 
> exceptions I have a specimen from Russia that has both. I 
> believe that would indicate my Russian specimen is right on 
> the boundary ( isograd) between the two. (adjacent 
> metamorphic zones on a map are separated by isograds or line 
> of equal grade.)
> 
>  Not sure about the alteration of kyanite to mica, but I do 
> know cordierite alters to mica, so there is a good 
> possibility. Kyanite is often found  mica schist.
> 
> Carolyn Reynard
> 
> 
> 
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