View previous topic :: View next topic |
Author |
Message |
cfrench58
Joined: 04 Aug 2021
Posts: 18
|
Posted: Aug 04, 2021 08:27 Post subject: Tsumeb Zincolivenite association - light blue acicular mineral = ? |
|
|
Hello, I recently came across a Tsumeb TN labeled "Zincolivenite - Adamite" . The label is recent however the specimen was sourced around 1987. Upon examination under glass there is an association with a light blue acicular mineral accompanied by minute black granular aggregates. Rosasite immediately came to mind but it does not appear to be listed as an association for Zincolivenite at Tsumeb. Any thoughts?
Thank you!
Mineral: | Zincolivenite |
Locality: | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
|
Dimensions: | 24x16x9 mm |
Description: |
|
Viewed: |
4097 Time(s) |
|
Mineral: | Zincolivenite |
Locality: | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
|
Dimensions: | FOV approx 5x5 mm |
Description: |
|
Viewed: |
4088 Time(s) |
|
Mineral: | Zincolivenite |
Locality: | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
|
Dimensions: | FOV approx 3x3 mm |
Description: |
|
Viewed: |
4082 Time(s) |
|
Mineral: | Zincolivenite |
Locality: | Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia | |
|
Dimensions: | FOV approx 10x6 mm |
Description: |
|
Viewed: |
4084 Time(s) |
|
|
|
Back to top |
|
|
Peter Megaw
Site Admin
Joined: 13 Jan 2007
Posts: 963
Location: Tucson, Arizona
|
Posted: Aug 04, 2021 10:08 Post subject: Re: Tsumeb Zincolivenite Association - light blue acicular mineral = ? |
|
|
with the pale blue color and extremely elongate crystals I would suspect aurichalcite over rosasite...but there are several acicular blue alternatives for Tsumeb...stranskyite?
_________________ Siempre Adelante! |
|
Back to top |
|
|
Stefan Koch
Joined: 15 Nov 2011
Posts: 14
|
Posted: Aug 04, 2021 12:29 Post subject: Re: Tsumeb Zincolivenite Association - light blue acicular mineral = ? |
|
|
Hi,
The transparent mineral looks like calcite to me.
Cheers,
Stefan
|
|
Back to top |
|
|
Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4906
Location: Barcelona
|
Posted: Aug 04, 2021 14:51 Post subject: Re: Tsumeb Zincolivenite Association - light blue acicular mineral = ? |
|
|
cfrench58 wrote: |
Thank you! From my (layman's simplistic) perspective the mineral formula for Aurichalcite (Zn,Cu)5(CO3)2(OH)6 would suggest that its paragenesis might lead to association with Zincolivenite CuZn(AsO4)(OH), although neither Tsumeb . com nor Mindat list the association as "common." Really appreciate your feedback!
-C
|
|
|
Back to top |
|
|
|