FMF - Friends of Minerals Forum, discussion and message board

[John S. White]

Here is a favorite in my collection. This is a faceted beryl from Minas Gerais, Brazil, weighing 119.23 carats. It measures 4 cm in length. What is wonderful about this beryl is that it contains one of the best and most dramatic screw dislocations that I have ever seen. I bought a large crystal with this inclusion in Tucson in 2006 and had it cut by Michael Gray into this lovely gem. Those of you who are opposed to the cutting up of crystals should know that this one was badly damaged and of very little value as a specimen. I would never consider cutting a fine crystal specimen. An article about this gem can be found in Jewelry Artist, December 2008, pp. 53-55.

I am sharing this with readers of this Forum in part because of my friend Jordi's unreasonable aversion to all things cut and polished in the mineral world!

Photo by Jeff Scovil

[Jordi Fabre]

Puagghhh! ;-)

Thanks John, it is great to share with everybody your wonderful collection (including these awful cut and polished things ;-)

Jordi

[Carles Millan]

Hi, John!

I agree completely with Jordi and his "Puagghhh!". But setting this jewel aside, I guess you must have a great collection. Please, take the patience of posting it here, piece a piece, for all of us to look at them.

Carles Millan

[MaryFender]

I think it is a lovely gem. A fine gem collection enhances a mineral collection. One of my favorite collections is the JP Morgan diamond collection housed in New York. Of course my gem collection is set in gold and hangs from my ears - one of the pleasures of being a "woman collector".

[Gail]

John, how fascinating and beautiful, thanks for sharing!

[John S. White]

There will be an article about my single crystal collection coming up soon in Mineralogical Record. Of course this is just one type of what I collect, will try to provide some photos of other things but don't want to pre-empt the MR article.

[Brooks]

That is so cool. I will look forward to that. Before I became interested in mineral collecting I was a "rock butcher" or lapidary. Hey, some minerals, such as agates, can only be cut to bring out their inner beauty, much like thundereggs, geodes, etc.

[John S. White]

Okay, I can’t resist a little teaser. In addition to my single crystal collection, I also collect quartz. I especially like quartzes that have some interesting feature, such as inclusions. This is one of my favorite, and is from Meigu, Liangshan, Sichuan, China. These “nails” in quartz are hematite and they measure about 1 mm in length. My interpretation of what has happened here is that the red stems consist of finely dispersed hematite and they grew at the same rate as the quartz which encloses them. Then, the quartz ceased growing, allowing the hematite to form caps. After this the quartz resumed growing and completely enclosed the “nails.” This photo was taken through a natural crystal face, the piece has not been cut and polished. The caps are black because they are denser than the stems. We all know, of course, that hematite is actually red when it is very thin or powdered.

Photo by John Koivula.

[Tracy]

Thanks for sharing John, looking forward to the article!

- Tracy

[MaryFender]

Very cool. Quartz is one of the most under-appreciated minerals.

[Brooks]

Thanks for sharing that really unique photo and story behind it. I too really find quartz a fascinating mineral to collect. It certainly is not boring, is it? I will look forward to the Min Rec article. Of course I look forward to every Min Rec anyway. Thanks again John.

[marvsT/Nminerals]

John, I, also,collect quartz. The hematite "nails" are really "cool"! If I ever get educated in the use of my digital camera and my computer I will send in some quartz examples that have the alternate prism faces etched. Dauphine twins perhaps? Marv

[Peter]

Lovely!
I have seen very similar screw dislocations in for instance blue topaz from the Urals (Mokrusha Mine, Alabaskha Pegmatite field, 6 km N of Murzinka)

[John S. White]

At Jordi's urging I am going to post some more photos of pieces from my quartz collection. I believe I posted a very poor photo of this one already, this is a much better photo. This curved quartz with light chlorite inclusions is from the Chivor mine, Colombia and it measures almost 7 cm across. Jeff Scovil photo.

[Jordi Fabre]

Yupiii! ;-)