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Roger Warin
Joined: 23 Jan 2013
Posts: 1232
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 Posted: Sep 15, 2013 08:54 Post subject: Euclase, an equant crystal |
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Hi,
Here is a good example of equant crystal of euclase. Origin: Gachala, Colombia.
Crystal system: monoclinic.
Unusual crystal habit, I think.
Can I hear from Pete? many thanks.
Roger.
| Description: |
Euclase
Gachala, Colombia
9 mm
equant crystal |
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52682 Time(s) |
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Mark Ost
Joined: 18 Mar 2013
Posts: 516
Location: Virginia Beach
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| Posted: Sep 15, 2013 20:59 Post subject: Re: Euclase, an equant crysal |
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| Roger. It is beautiful. Never seen anything like it.
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Roger Warin
Joined: 23 Jan 2013
Posts: 1232
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| Posted: Sep 16, 2013 04:08 Post subject: Re: Euclase, an equant crysal |
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Hi List,
Here is probably the best euclase in the world.
It was exhibited for the first time in Munich Expo in 2002.
Roger Titeux told me it originated from Gachala, Colombia.
What do you think about?
Roger.
| Description: |
Euclase
Gachala, Colombia
> 15 cm - I think |
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52509 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Sep 16, 2013 04:18 Post subject: Re: Euclase, an equant crysal |
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| Roger Warin wrote: | Hi List,
Here is probably the best euclase in the world.
It was exhibited for the first time in Munich Expo in 2002.
Roger Titeux told me it originated from Gachala, Colombia.
What do you think about?
Roger. |
Wow Roger!!!!!! Is this mind blowing specimen your's or your name sake's? If indeed your's, well done.
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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| Posted: Sep 16, 2013 04:19 Post subject: Re: Euclase, an equant crysal |
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| Roger Warin wrote: | | ....What do you think about? |
It exists another even better. Smaller, but unbroken.
Anyway, both are fabulous and yes, both came from Gachalá.
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 843
Location: Northeast Ohio
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| Posted: Sep 16, 2013 15:04 Post subject: Re: Euclase, an equant crysal |
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| Roger Warin wrote: | Hi,
Here is a good example of equant crystal of euclase. Origin: Gachala, Colombia.
Crystal system: monoclinic.
Unusual crystal habit, I think.
Can I hear from Pete? many thanks.
Roger. |
If you mean me, Roger, I protest that I am not an expert on the habit of euclase, but I would say this is an unusual habit in my limited experience. None of the drawings in Goldschmidt are very similar to this one; most are of the typical prismatic habit like the other one you posted later.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5025
Location: Barcelona
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| Posted: Sep 16, 2013 15:17 Post subject: Re: Euclase, an equant crysal |
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Another example
| Description: |
Euclase
Piaotang Mine, Dayu, Jiangxi, China
Specimen size: 3.4 × 1.9 × 1.8 cm
Mined in 2007
Photo: Reference Specimens |
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52498 Time(s) |
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Mark Ost
Joined: 18 Mar 2013
Posts: 516
Location: Virginia Beach
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| Posted: Sep 16, 2013 18:22 Post subject: Re: Euclase, an equant crysal |
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| OK Jordi....
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Martin Rich
Joined: 15 Aug 2013
Posts: 127
Location: Lower Austria
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| Posted: Sep 16, 2013 19:49 Post subject: Re: Euclase, an equant crysal |
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In Alpine clefts, there occure sometimes Euclase with typical shape like in the first foto. I made a drawing similar to this fabolous blue crystal in the first foto.
Martin
| Description: |
Euclase
Euclase typical for Alpine clefts. |
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52279 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Sep 16, 2013 20:07 Post subject: Re: Euclase, an equant crysal |
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Another exceptional specimen made the cover page of the Mineralogical Record not long ago
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Sep 16, 2013 20:09 Post subject: Re: Euclase, an equant crysal |
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The MinRec specimen before trimming... looks slightly different!
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Roger Warin
Joined: 23 Jan 2013
Posts: 1232
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| Posted: Sep 17, 2013 01:41 Post subject: Re: Euclase, an equant crysal |
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Hi Pete, Martin, and List,
Thank you for your opinions.
I never doubted the origin nor the identification of this euclase given by Roger Titeux, this extraordinary broker in mineralogy of high quality. He was a friend I regret the loss.
Thank Martin to show us a similar habit but still slightly different from my specimen.
Indeed, the blue of this stone is vivid, but blue is still poorly made by my camera that tends to make "electric" shades of blue. This camera is very sensitive in shades of blue-purple.
I use the Leica DFC 450 camera.
Roger.
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Martin Rich
Joined: 15 Aug 2013
Posts: 127
Location: Lower Austria
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| Posted: Sep 17, 2013 15:00 Post subject: Re: Euclase, an equant crysal |
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Roger,
you are right, my drawing is only similar but I think this shape is not unusual. If you want to get sure, you have to make a goniometric measure.
Ok, I tryed it again but it is very hard from one single picture (sorry Roger, that I "killed" your wonderful photograph).
Martin
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52020 Time(s) |
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 843
Location: Northeast Ohio
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| Posted: Sep 17, 2013 15:52 Post subject: Re: Euclase, an equant crysal |
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| Martin Rich wrote: | Roger,
you are right, my drawing is only similar but I think this shape is not unusual. If you want to get sure, you have to make a goniometric measure.
Ok, I tryed it again but it is very hard from one single picture (sorry Roger, that I "killed" your wonderful photograph).
Martin |
Well done, Martin! I suspect the areas marked ? may be areas of abrasion.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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Martin Rich
Joined: 15 Aug 2013
Posts: 127
Location: Lower Austria
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| Posted: Sep 17, 2013 20:40 Post subject: Re: Euclase, an equant crysal |
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| Pete Richards wrote: |
Well done, Martin! I suspect the areas marked ? may be areas of abrasion. |
Thank you Pete!
I think also this areas are of abrasion. The image is not very clear, so I post only the drawing again.
Martin
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