Here is the report on the mix from the University of Washington:
University of Washington Geology Dept.
From: vshowell@comcast.net [mailto:vshowell@comcast.net]
Sent: Wednesday, July 11, 2012 12:19 AM
To: Michael Hoover
Subject: Re: Pink stone at 7+ MOHS from Okanogan county
No, you sent plenty of sample,
and i will do more testing.
This was excellent because I forgot that you might have already mentioned Zoisite prior.
I looked at that xrd pattern.... and just thought...oh shit...this might be a tough one,
because it has so many small peaks...it might be a big mix...
I am not done, it might have a small contaminant,
but the overall evidence pointed straight to zoisite as the directly definable mineral,
and the pattern appeared to be overall clean.
The main predominant Zoisite peak was right on the number exact for all practical purposes.
I think that we have it on the first try.
But be reserved in content here because this is the first test.
I will test more next week.
thanks!
Vic
From: vshowell@comcast.net [mailto:vshowell@comcast.net]
Sent: Monday, July 23, 2012 10:48 AM
To: Michael Hoover
Subject: Re: Pink stone at 7+ MOHS from Okanogan county
Hi Mike,
I tested 2 blacks sections.
One was a thin area around the thin slab.
The other was off the thick slab.
Thick slab:
very odd tremolite pattern mixed in with a plagioclase- most likely albite,
some serp and chlorite, maybe a pinch of zoisite.
thin section:
the same but a much better tremolite pattern, less plagioclase,
and a little more zoisite.
I will do some more testing on the pink stuff soon, and let you know soon.
Also imaged the zoisite in electron microscope.
When all is done I will email you again in the next week.
I have been super busy,
thanks so much for the sample.
Vic