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Mineral specimens with inclusions - (28)
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Craig Mercer




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PostPosted: Feb 10, 2012 04:52    Post subject: Re: Mineral specimens with inclusions  

Wow there are some incredible specimen being shown. I really enjoy looking at this one, I hope you do also. It is a complete Quartz inside a larger Quartz on a bed of Chlorite.


DSCF0035[1].jpg
 Description:
Quartz
Brazil
5mm x 3mm
 Viewed:  7661 Time(s)

DSCF0035[1].jpg


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cascaillou




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PostPosted: Feb 22, 2012 13:19    Post subject: Re: Mineral specimens with inclusions  

Doubly terminated quartz crystal (unpolished) with 4-phase inclusions.

The four phases (which are trapped inside negative crystals) are:
-yellow petroleum (oily flammable hydrocarbon), it shows bluish fluorescence under UV
-immiscible water (colorless)
-methane gaz bubble (moving freely within the petroleum phase)
-solid particles of black to dark brown asphaltite (generic term for bituminous hydrocarbons), these particles arn't moving in this sample (but have been reported to move freely in other samples)

Origin: Balochistan, Pakistan
size:1.9x1.4x1.3cm
weight: 15.35ct

The largest petroleum pocket (mammoth shaped) is 8x6mm at the largest point, with a 2mm diameter moving bubble.

note: avoid heat and avoid ultrasonic cleaning



incandescent.jpg
 Description:
petroleum in quartz (4-phase inclusions)
Balochistan, Pakistan
1.9x1.4x1.3cm
 Viewed:  7494 Time(s)

incandescent.jpg



lwuv.jpg
 Description:
petroleum in quartz (4-phase inclusions) under LWUV
Balochistan, Pakistan
1.9x1.4x1.3cm
 Viewed:  7485 Time(s)

lwuv.jpg


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B&A




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PostPosted: Mar 27, 2012 09:57    Post subject: Re: Mineral specimens with inclusions  

A Hollandite star in Quartz
(The surfaces are polished)



Naamloos.jpg
 Description:
Hollandite in Quartz
Anketsaketsa, Ambatofinandrahana District, Madagascar
2,8 cm x 1,8 cm x 1,5 cm
 Viewed:  7221 Time(s)

Naamloos.jpg


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Elise




Joined: 22 Dec 2009
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PostPosted: Aug 05, 2012 10:57    Post subject: Re: Mineral specimens with inclusions  

Hi,

This is a photomicrograph taken by John Koivula of an interesting agate I showed him a couple weeks ago. He was showing me how a contrast filter can bring up details that I wanted to be able to study under the microscope which were somewhat murky in the depths of the agate without (the red area in the image). John is an amazing teacher and I believe truly one of the great minds of our time; something my colleagues have also come to appreciate as I've made them aware of his work and he's joined us in our research activities. For those who don't know of his books, see John White's thread on the PhotoAtlas series http://www.mineral-forum.com/message-board/viewtopic.php?p=11689#11689
I was interested in the slight iris effect seen in the concretions. Also, what I thought would be angular quartz druzy (whitish areas in the cabochon photo) turned out to be hundreds of tiny spheres - really neat and a lot of fun to look at under the microscope...I keep expecting to find a few polywogs someday!

Best wishes,
Elise
PS: the cabochon was cut by Paul Stalker who christened it "Pond Life" and hoped I'd continue to call it that. It really looks like I found it in my pond!



concretion20x5smKoivula.jpg
 Description:
Quartz, Agate
Concretion in an agate, likely from Madagascar. 20 x magnification, red contrast filter. Photomicrograph: John I. Koivula, 2012.
 Viewed:  6730 Time(s)

concretion20x5smKoivula.jpg



agatePondLife18a.jpg
 Description:
Quartz, Agate
Madagascar
50 x 25 mm
Christened "Pond Life" by Paul Stalker, the lapidary who cut this agate. The concretions are Fe type, hematite maybe (photographer at fault: Elise Skalwold)
 Viewed:  6663 Time(s)

agatePondLife18a.jpg



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Elise Skalwold
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am mizunaka




Joined: 09 Apr 2010
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PostPosted: Aug 24, 2012 04:32    Post subject: Re: Mineral specimens with inclusions  

Quartz with unknown inclusion.


QtzVerch.jpg
 Description:
Quartz
Verchniy Mine, Dal'negorsk, Primorskiy Kray, Russia
14.4 x 11.8 cm
 Viewed:  6599 Time(s)

QtzVerch.jpg



QtzDet1.jpg
 Description:
Quartz
Verchniy Mine, Dal'negorsk, Primorskiy Kray, Russia
 Viewed:  6598 Time(s)

QtzDet1.jpg



QtzDet2.jpg
 Description:
Quartz
Verchniy Mine, Dal'negorsk, Primorskiy Kray, Russia
 Viewed:  6606 Time(s)

QtzDet2.jpg


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Jordi Fabre
Overall coordinator of the Forum



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PostPosted: Aug 24, 2012 10:25    Post subject: Re: Mineral specimens with inclusions - (28)  

am mizunaka wrote:
Quartz with unknown inclusion.

The inclusions are probably the same Siderite of outside the Quartz...
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Bergur_E_Sigurdarson




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PostPosted: Dec 23, 2017 06:53    Post subject: Re: Mineral specimens with inclusions - (28)  

A Colombian Quartz with Pyrite inclusions.

The inclusions aren't in a crystal habit of the Pyrite, but do seem to adhere to two planes in the Quartz, even tho the Pyrite itself is of irregular shapes.

Main crystal dimensions : H 45mm x W 9-15mm

Seller stated "Muzo" as origins.... which given it's size is possible,
but nearly all her other offerings were from Santander department
(even though she also said those were "Muzo")



quartz-pyrite-inclusions.jpg
 Mineral: Quartz, Pyrite
 Locality:
Colombia
 Dimensions: H 4.5cm x W 3.5cm x D 3.1cm
 Description:
Not specifying locality, as both Muzo, Boyaca and Santander dept. are possible.
 Viewed:  1284 Time(s)

quartz-pyrite-inclusions.jpg


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Jesse Fisher




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PostPosted: May 28, 2018 12:07    Post subject: Re: Mineral specimens with inclusions - (28)  

A penetration twinned fluorite crystal with a two-phase fluid inclusion. The trapped gas bubble shows 3-4 mm of movement within the cavity.


15-9147r.JPG
 Mineral: Fluorite
 Locality:
Rogerley Mine, Frosterley, Weardale, North Pennines Orefield, County Durham, England, United Kingdom
 Dimensions: 2.2 cm on edge
 Description:
 Viewed:  303 Time(s)

15-9147r.JPG


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