A closer look at this mineral https://skfb.ly/6uSI9
3D: https://skfb.ly/6xQys
40x objective, 75x on sensor (x axis approx. 0,5mm)
Crossed eye-stereo
Best regards
Jörgen Hellberg
Mineral
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Mineral
Jörgen Hellberg, my webbsite www.hellberg.photo
- Cactusdave
- Posts: 1631
- Joined: Tue Jun 09, 2009 12:40 pm
- Location: Bromley, Kent, UK
Very nice result indeed at this rather high magnification. I'm sure people would be interested in the objective and method of illumination if it isn't a trade secret.
I assume the mineral is Bornite, aka 'peacock ore', an iron, copper sulphide mineral known for it's iridescent colours.
https://en.wikipedia.org/wiki/Bornite
I've not seen a brilliant cleavage face exposed like this. Did you create it or was it a natural feature on your sample?
I assume the mineral is Bornite, aka 'peacock ore', an iron, copper sulphide mineral known for it's iridescent colours.
https://en.wikipedia.org/wiki/Bornite
I've not seen a brilliant cleavage face exposed like this. Did you create it or was it a natural feature on your sample?
Leitz Ortholux 1, Zeiss standard, Nikon Diaphot inverted, Canon photographic gear
Thanks GaryB, Harald and Cactusdave!
Thanks for the ID- of the mineral!
I have only done some minimal cleaning but I do not know how it was treated before I got it.
Best regards
Jörgen Hellberg
Edit: I do not know the history of this mineral and it seems to be quite simple to "change" chalcopyrite to look like this, so I am not totally sure about the ID.
No trade secret, just slightly polarized EPI-light trough a Nikon Plan Fluor ELWD 40x / 0.60 00/0-2 WD 3.7-2.7Cactusdave wrote:Very nice result indeed at this rather high magnification. I'm sure people would be interested in the objective and method of illumination if it isn't a trade secret.
I assume the mineral is Bornite, aka 'peacock ore', an iron, copper sulphide mineral known for it's iridescent colours.
https://en.wikipedia.org/wiki/Bornite
I've not seen a brilliant cleavage face exposed like this. Did you create it or was it a natural feature on your sample?
Thanks for the ID- of the mineral!
I have only done some minimal cleaning but I do not know how it was treated before I got it.
Best regards
Jörgen Hellberg
Edit: I do not know the history of this mineral and it seems to be quite simple to "change" chalcopyrite to look like this, so I am not totally sure about the ID.
Jörgen Hellberg, my webbsite www.hellberg.photo
- Cactusdave
- Posts: 1631
- Joined: Tue Jun 09, 2009 12:40 pm
- Location: Bromley, Kent, UK
You are right it could be chalcopyrite, another copper, iron sulphide closely related chemically to bornite. To a non mineralogist like me the less common iridescent form of chalcopyrite can look pretty similar to bornite. A view of the entire mineral piece might help.
Leitz Ortholux 1, Zeiss standard, Nikon Diaphot inverted, Canon photographic gear
Thanks Jacek
Cactusdave - The reason that I am not sure if this is bornite or chalcopyrite is this text:
https://csmsgeologypost.blogspot.se/201 ... yrite.html
Obviously, it is quite easy to change chalcopyrite.
Any way it is a nice looking mineral.
Best regards
Jörgen Hellberg
Cactusdave - The reason that I am not sure if this is bornite or chalcopyrite is this text:
https://csmsgeologypost.blogspot.se/201 ... yrite.html
Obviously, it is quite easy to change chalcopyrite.
Any way it is a nice looking mineral.
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo