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

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
22 Jul-17:24:58 Re: franjungle collection (Franjungle)
22 Jul-17:07:38 Re: the mizunaka collection (Franjungle)
22 Jul-16:10:32 Re: glass or something else? (Diamond)
22 Jul-10:03:56 Re: micro photos of inclusions in quartz (Zbhjzm)
22 Jul-10:01:49 Re: micro photos of inclusions in quartz (Zbhjzm)
22 Jul-08:53:06 Re: collection of fiebre verde - chivor (#704) (Fiebre Verde)
22 Jul-04:22:19 Re: collection of heimo hellwig (Heimo Hellwig)
22 Jul-00:41:13 Re: sainte marie-aux-mines show 2018 (Roger Warin)
21 Jul-14:56:49 Re: glass or something else? (James)
21 Jul-00:23:01 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Justin Hickok)
21 Jul-00:19:50 Re: glass or something else? (Justin Hickok)
20 Jul-21:47:30 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-21:35:47 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-21:23:43 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-16:14:13 Re: glass or something else? (Vic Rzonca)
20 Jul-14:12:47 The mizunaka collection - orthoclase (Am Mizunaka)
20 Jul-13:25:34 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Peter Lemkin)
20 Jul-11:59:54 Re: glass or something else? (Justin Hickok)
20 Jul-11:09:23 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Justin Hickok)
20 Jul-11:08:35 Re: all the diamonds one could fill your house with - and more - so near...yet so far..... (Justin Hickok)
20 Jul-00:28:07 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-00:20:30 Re: sainte marie-aux-mines show 2018 (Roger Warin)
20 Jul-00:02:38 Re: sainte marie-aux-mines show 2018 (Roger Warin)
19 Jul-15:40:28 Re: sainte marie-aux-mines show 2018 (Roger Warin)
18 Jul-16:00:11 The mizunaka collection - quartz (Am Mizunaka)

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
44193


The time now is Jul 22, 2018 19:33

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
White stone
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
Like
1


View previous topic :: View next topic  
Author Message

Bashka




Joined: 10 Apr 2018
Posts: 5

View user's profile

Send private message

PostPosted: Apr 11, 2018 01:40    Post subject: White stone  

Please help me identify this mineral, it is smooth, really heavy despite its rather small size,


IMG_20180409_221757.jpg
 Mineral: I don't know, tell me please if you know
 Description:
Florida
50mm
Smooth, white, heavy, feels very hard but looks like white candle
 Viewed:  1121 Time(s)

IMG_20180409_221757.jpg


Back to top
Reply to topic Reply with quote
Like
   

kakov




Joined: 24 Jul 2013
Posts: 39
Location: Madrid


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 11, 2018 02:26    Post subject: Re: White stone  

Hi, looks like opal, but you need to provide more information please. E.g. In which context did you find them?
Back to top
Reply to topic Reply with quote
Like
1
   

Bashka




Joined: 10 Apr 2018
Posts: 5

View user's profile

Send private message

PostPosted: Apr 12, 2018 08:37    Post subject: Re: White stone  

I have found them near the sandy beach, I have many collection of them, I have also noticed that whenever I put it in water, it becomes unusually colder and it is pleasing to rub it against your body and hence loving the cool sensation. I hope this is an indication that the stone absorbs water. Please reply, Thanks Kakov
Back to top
Reply to topic Reply with quote
Like
   

Kevin Schofield




Joined: 05 Jan 2018
Posts: 39
Location: Houston TX

View user's profile

Send private message

PostPosted: Apr 12, 2018 09:47    Post subject: Re: White stone  

Looks like alabaster to me...finely-crystalline/massive form of gypsum (calcium sulphate). If it is, it will be easily scratched by a knife if you want to test.
The fact that several of the pieces seem to be carved/shaped would support this idea.

_________________
Veni, Vidi, Emi
Back to top
Reply to topic Reply with quote
Like
   

kakov




Joined: 24 Jul 2013
Posts: 39
Location: Madrid


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 12, 2018 09:49    Post subject: Re: White stone  

Please try to see if they are hard enough to scratch glass. If yes => probably some quartz relative. (opal, chalcedony or other)

If you have access to UV light, check if they are fluorescent. (if you have friends collecting stamps they might have one. Also you have UV light in clubs (what was called disco when I still used to frequent them) - although it is probably not the best place for testing minerals, hahaha)
Back to top
Reply to topic Reply with quote
Like
   

vic rzonca




Joined: 18 Nov 2008
Posts: 702
Location: MA


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 12, 2018 12:36    Post subject: Re: White stone  

Bashka wrote:
I have found them near the sandy beach, I have many collection of them, I have also noticed that whenever I put it in water, it becomes unusually colder and it is pleasing to rub it against your body and hence loving the cool sensation. I hope this is an indication that the stone absorbs water. Please reply, Thanks Kakov


Of course just a guess. Calcium carbonate in the form of bits of sea shell. The environment seems right. Hardness test will rule it out.
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> FOR BEGINNERS: 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 2006-2018


Powered by FMF