We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


Spanish message board






Newest topics and users posts
29 Mar-00:03:53 Identification question (Jim Wilkinson)
28 Mar-23:16:36 Re: collection of volkmar stingl (Volkmar Stingl)
28 Mar-18:25:15 Re: collection of firmo espinar (Firmo Espinar)
28 Mar-09:37:50 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-19:47:08 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Pete Richards)
27 Mar-16:15:44 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-15:18:59 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Alfredo)
27 Mar-14:39:29 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-05:21:48 Re: the mim museum in beirut, lebanon (Mim Museum)
27 Mar-05:03:26 Re: trying to find information on rose/pink quartz and tourmaline associations. (Ning)
27 Mar-02:39:50 Re: the mim museum in beirut, lebanon (Tobi)
27 Mar-00:23:28 Re: collection of volkmar stingl (Volkmar Stingl)
26 Mar-00:53:41 Re: collection of volkmar stingl (Volkmar Stingl)
25 Mar-13:32:10 Re: collection of michael shaw (Michael Shaw)
25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
23 Mar-13:35:22 Re: collection of firmo espinar (Firmo Espinar)
22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
22 Mar-04:20:41 Re: the mim museum in beirut, lebanon (Mim Museum)
21 Mar-22:49:19 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:47:40 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:45:25 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-15:34:23 Re: the mizunaka collection - quartz (Am Mizunaka)
21 Mar-14:35:08 Re: jim’s mineral collection (Jim Wilkinson)
21 Mar-14:15:36 The 4th phoenix heritage mineral show (phms) hosted by mineralogical society of arizona (m (Chris Whitney-smith)
21 Mar-04:36:10 Re: the mizunaka collection (Tobi)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
111806


The time now is Mar 29, 2024 01:39

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
Calcite ?
  
  Index -> What is it? - Where is it from?
Like
5


View previous topic :: View next topic  
Author Message

Dany Mabillard




Joined: 01 Jul 2019
Posts: 312
Location: Valais


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 09, 2020 09:33    Post subject: Calcite ?  

Hello everybody,

I need some help to identify this mineral if it is one, found in Mellikon, Argovie, Switzerland.

Thank you in advance for the time you'll take to answer me.

Have a nice day.

Best regards.



Calcite no 144 - FMF.JPG
 Description:
Mellikon, Argovie, Switzerland
130 mm x 90 mm x 50 mm
 Viewed:  5323 Time(s)

Calcite no 144 - FMF.JPG


Back to top
Reply to topic Reply with quote
Like
2
   

vic rzonca




Joined: 18 Nov 2008
Posts: 820
Location: MA


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 09, 2020 11:27    Post subject: Re: Calcite ?  

Dany, you might try an acid test on a bit of the unknown, possibly scraped from an in-obvious place. Put a few drops of lemon juice on it. If it fizzes, combined with the location, would indicate limestone.
Back to top
Reply to topic Reply with quote
Like
   

Michael Shaw
Site Admin



Joined: 30 Apr 2008
Posts: 2060
Location: Oklahoma


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 09, 2020 11:36    Post subject: Re: Calcite ?  

Dany,

Mindat lists Mellikon as a quarry in Jurassic limestones. My guess is that you will find an acid test yields positive results indicating a carbonate. Your specimen looks to me like a calcite or limestone replacement of coral.

Michael
Back to top
Reply to topic Reply with quote
Like
1
   

SteveB




Joined: 12 Oct 2015
Posts: 235
Location: Canberra

View user's profile

Send private message

PostPosted: Aug 10, 2020 00:30    Post subject: Re: Calcite ?  

Looks like a coated coral, likely fossilised with outer coating of calcite, possibly chalk. The smoothness is unnatural for Coral. But there are indications is not waterworn and crusty cavities I expect you will find tiny crystal growth If you examine under magnification. Examination of the breakage underneath may also help. It may show deposition rings to help out.
Back to top
Reply to topic Reply with quote
Like
   

Dany Mabillard




Joined: 01 Jul 2019
Posts: 312
Location: Valais


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 10, 2020 12:08    Post subject: Re: Calcite ?  

Thank you Michael, Vic and Steve for your answers. I will do the test and investigations next weekend when I can access the specimen.

Have a nice week.

Dany.
Back to top
Reply to topic Reply with quote
Like
   

Riccardo Modanesi




Joined: 07 Nov 2011
Posts: 618
Location: Milano

View user's profile

Send private message

PostPosted: Aug 11, 2020 03:14    Post subject: Re: Calcite ?  

Hi to everybody!
Yes, I agree with Steve: in my opinion it's a fossil coral. The area is well known both for corals and for ammonites and nautiloids. Some corals DO have this aspect.
Greetings from Italy by Riccardo.


SteveB wrote:
Looks like a coated coral, likely fossilized with outer coating of calcite, possibly chalk. The smoothness is unnatural for Coral. But there are indications is not waterworn and crusty cavities I expect you will find tiny crystal growth If you examine under magnification. Examination of the breakage underneath may also help. It may show deposition rings to help out.

_________________
Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
Back to top
Reply to topic Reply with quote
Like
1
   

Dany Mabillard




Joined: 01 Jul 2019
Posts: 312
Location: Valais


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 16, 2020 10:08    Post subject: Re: Calcite ?  

Thank you all for your answer. I tried with the lemon in the back where it's like the front without success but maybe I haven't done correctly. In the back, the whiter part seems to be Chalk (1 in the moh's scale). I put 2 photos from the back

Have a nice day.



Calcite no 144 - FMF -2.JPG
 Locality:
Switzerland
 Description:
 Viewed:  4963 Time(s)

Calcite no 144 - FMF -2.JPG



Calcite no 144 - FMF -4.JPG
 Description:
 Viewed:  4944 Time(s)

Calcite no 144 - FMF -4.JPG


Back to top
Reply to topic Reply with quote
Like
   

vic rzonca




Joined: 18 Nov 2008
Posts: 820
Location: MA


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Aug 16, 2020 10:34    Post subject: Re: Calcite ?  

Dany Mabillard wrote:
Thank you all for your answer. I tried with the lemon in the back where it's like the front without success but maybe I haven't done correctly. In the back, the whiter part seems to be Chalk (1 in the moh's scale). I put 2 photos from the back

Have a nice day.


Well, you have a result to your test. May be your technique or it may be negative for carbonate. Your hardness test adds to the "knowns" as Donald Rumsfeld might say. It looks to have several minerals in bits or in layers. It seems fossiliferous. :-)



brain coral.jpg
 Mineral: Brain coral, dried, non-fossilized.There are many types.
 Description:
 Viewed:  4905 Time(s)

brain coral.jpg


Back to top
Reply to topic Reply with quote
Like
1
   
Display posts from previous:   
   Index -> What is it? - Where is it from?   All times are GMT - 5 Hours
Page 1 of 1
    

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2024


Powered by FMF