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Posted by David Von Bargen  
Everett Harrington September 06, 2010 05:48PM
Hi Guys,
The specimen in question was in an old wooden box with about 30 others, all were very gemmy crystals and written on the box in pencil was Thomas mine, this is how I came to think this piece was from Thomas, I'll delete the location, I'm sure that Keith is spot on :)


Igor Savin September 06, 2010 06:21PM

This deposit (Borisovskie Sopki) was found at the end of 19th century. Now it is developed only by mineral collectors and consists of several open pits. The largest crystals from this deposit were 20 cm long. I saw crystals with dimensions of about 15 x 3 x 1 cm. Kyanite crystals have inclusions of quartz, mica, rutile, and tourmaline. Gem material is rare.

Keith Wood September 06, 2010 07:16PM

Thanks. I'll think about it. I am in the midst of moving my household from one end of the state to another, so I can't promise anything soon.

Keith Wood September 06, 2010 07:19PM
Perhaps some of the other specimens in the box were from the Thomas mine. Attach a few pictures to a reply and we can all have a look.
Luiz Alberto Dias Menezes, Fo. September 07, 2010 12:06AM
Hi David:

I will be able to correct most of the Brazilian kyanite localities; I am in Tucson now, finishing to sort minerals that I will be bringining to Denver, so I cannot make the corrections now; on the next few days, as soon as I can, I will send you my comments.

Everett Harrington September 07, 2010 04:21AM
All the specimens look just like the one I posted, sericite/feldspar mix, there are a lot of loose crystals, none that I can recall off the top of my head that were termed.

Michael jaynes August 23, 2014 08:05PM
I personally witnessed Gary Ledford facet flawless intense teal and dark kyanite from the balsam gap area in the late 1980s and early 1990s....largest was almost 90 cts...flawless at 10x. I also faceted this material at Gary's shop up to about 30 cts...flawless. It is by far the best faceted kyanite I have ever seen. I have collected with the late mr Thomas and we called the site the Thomas mine. - mjaynes
Ferdinando Giovine August 24, 2014 03:45AM
and mine twinned kyanite?????
José Zendrera August 24, 2014 09:54AM
In Nepal there is two active kyanite mines where gemmy facetable crystals are found:

Four specimens from any of the only two kyanite mines in operation in Nepal
Larger pieces below are pretty gemmy

Well terminated deep blue kyanite crystal under sunlight, seen backlit.
The prism is quite bent in the direction of c axis. Partially gemmy facetable quality.

Edited 1 time(s). Last edit at 08/24/2014 04:00PM by José Zendrera.
Hans Kloster September 12, 2016 08:35AM
I want to know how big the kyanite are? I have an agglomerate 8,2 kg, 37 cm and I think it is very big and nice to!
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