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Kimberlite and Diamond?
  
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Von_von




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PostPosted: Apr 06, 2024 02:23    Post subject: Kimberlite and Diamond?  

Could this be a diamond kimberlite? I see that down in the rock there seems to be quartz, there is no quartz in the kimberlite right? I am asking for your help? I have not seen real kimberlite. Is it a good sample?


Untitled-3.jpg
 Mineral: kimberlite
 Description:
 Viewed:  2209 Time(s)

Untitled-3.jpg



1704907588_cdcc7a51a74f3a6336baa69619c1cfcf-1100x800.jpg
 Mineral: kimberlite
 Description:
 Viewed:  2201 Time(s)

1704907588_cdcc7a51a74f3a6336baa69619c1cfcf-1100x800.jpg


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Roger Warin




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PostPosted: Apr 06, 2024 04:04    Post subject: Re: Kimberlite and Diamond?  

An easy first test: see if the white fluoresces yellow.
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Von_von




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PostPosted: Apr 06, 2024 04:55    Post subject: Re: Kimberlite and Diamond?  

Should the diamond glow yellow or the micro crystals at the base? What is this an indicator of? Thanks?
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Roger Warin




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PostPosted: Apr 06, 2024 07:31    Post subject: Re: Kimberlite and Diamond?  

Hello,
Munich is a magical city in many ways.
I have visited it around forty times since 1977 to admire the Mineralientage Muenchen exhibition by Johannes Keilmann.
The exhibition alone was worth the trip (700 km). Besides, the show taught me what university didn't give me.
This is an exceptionally rare kimberlite specimen. Have you often seen such kimberlite? We don't know how to count diamonds. Some have a perfect idiomorphic morphology.
You also see the texture of this igneous rock. This is a rare variety of peridotite which dominates in the upper part of the Earth's mantle.



Kimberlite_Statuette_10194_R.jpg
 Mineral: Diamond on Kimberlite
 Locality:
Kimberley Mine, Kimberley, Francis Baard District, Northern Cape Province, South Africa
 Description:
 Viewed:  2136 Time(s)

Kimberlite_Statuette_10194_R.jpg



Kimberlite_Statuette_10194-quat_R.jpg
 Mineral: Diamond on Kimberlite
 Locality:
Kimberley Mine, Kimberley, Francis Baard District, Northern Cape Province, South Africa
 Description:
 Viewed:  2129 Time(s)

Kimberlite_Statuette_10194-quat_R.jpg


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James Catmur
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PostPosted: Apr 06, 2024 08:23    Post subject: Re: Kimberlite and Diamond?  

Test the hardness of the crystal, test 8

https://www.mineral-forum.com/message-board/viewtopic.php?p=19487#19487
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Bob Carnein




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PostPosted: Apr 06, 2024 10:19    Post subject: Re: Kimberlite and Diamond?  

Roger, That looks too good to be natural. Am I wrong? It would be interesting to know many carats per ton?
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Jesse Fisher




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PostPosted: Apr 06, 2024 11:19    Post subject: Re: Kimberlite and Diamond?  

I recall seeing a dealer at the Munich show around that time who was selling diamond in kimberlite matrix specimen that had been assembled, though without the statuary. They were, however, labeled "montage."
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lluis




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PostPosted: Apr 06, 2024 12:34    Post subject: Re: Kimberlite and Diamond?  

As Jesse, I have always read that diamonds in kimberlite matrix are just assembled...
When I think in Chinese cinnabar mounted in matrix, well, nothing surprise me..
And besides, diamonds are very loosely attached to kimberlite (as Navajun pirites...).
So reglued....

With best wishes

Lluís
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