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
01 Mar-06:12:50 Re: collection of sante celiberti (Sante Celiberti)
01 Mar-01:04:48 Re: i want to know this stone (Volkmar Stingl)
28 Feb-16:49:10 Re: collection of firmo espinar (Firmo Espinar)
28 Feb-15:50:24 Re: i want to know this stone (Alshawani)
28 Feb-15:07:47 The mizunaka collection - quartz (Am Mizunaka)
28 Feb-13:42:50 Re: new generation for picture - ploum (Ploum)
28 Feb-01:15:52 Re: sometimes fluorescent (Jesse Fisher)
27 Feb-16:12:19 Re: sometimes fluorescent (Alfredo)
27 Feb-15:23:10 Popular minerals - rhodochrosite on hisingerite-neotocite (series) from mexico (Jordi Fabre)
27 Feb-11:42:17 Re: sometimes fluorescent (Steveb)
27 Feb-10:30:36 Re: sometimes fluorescent (James Catmur)
27 Feb-08:34:24 Re: sometimes fluorescent (Bergur_e_sigurdarson)
27 Feb-08:28:13 Sometimes fluorescent (Tom Mazanec)
26 Feb-23:38:54 Mineral talks live - episode 33 - dr. Federico pezzott; curator; nat hist museum of milan (Bluecapproductions)
26 Feb-23:37:34 Mineral talks live - episode 32 - jeff scovil - mineral photographer; phoenix, arizona, us (Bluecapproductions)
26 Feb-16:47:39 Re: collection of sante celiberti (Sante Celiberti)
26 Feb-14:07:46 Re: collection of michael shaw (Michael Shaw)
26 Feb-14:07:45 The mizunaka collection - beryl (Am Mizunaka)
26 Feb-10:01:34 Re: collection of jean suffert (Jean Suffert)
26 Feb-08:54:26 Re: the mineral collecting history of the 79 mine, gila county, arizona, usa - (33) (Tony L. Potucek)
25 Feb-23:48:45 Re: collection of volkmar stingl (Volkmar Stingl)
25 Feb-18:00:24 Popular minerals - octahedral fluorite from shangbao mine, china (Jordi Fabre)
25 Feb-13:40:55 Mineral talks live - episode 31 - dr. Gene meieran - private collector, oregon, usa (Bluecapproductions)
25 Feb-13:39:13 Mineral talks live - episode 30 - bryan swoboda; founder, bluecap productions hawai'i, usa (Bluecapproductions)
25 Feb-13:35:46 Mineral talks live - apologies!!! i've been lack! (Bluecapproductions)

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
79139


The time now is Mar 01, 2021 08:43

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.
Gold rock
  
  Index -> What is it? - Where is it from?
Like


View previous topic :: View next topic  
Author Message

matt1980




Joined: 12 Nov 2020
Posts: 5
Location: Kentucky

View user's profile

Send private message

PostPosted: Nov 13, 2020 08:50    Post subject: Gold rock  

Its metallic, it scratches glass, the color is just gold. I dont know where its from, my Grandpa had it. He lived in VA.
I considered it might be coated with something, but it doesnt scratch off. Thanks!



20201112_203849.jpg
 Dimensions: 2cm x 2cm
 Description:
 Viewed:  2006 Time(s)

20201112_203849.jpg


Back to top
Reply to topic Reply with quote
Like
   

SteveB




Joined: 12 Oct 2015
Posts: 158
Location: Canberra

View user's profile

Send private message

PostPosted: Nov 13, 2020 09:01    Post subject: Re: gold rock  

Might be a pyrite or a chunk of metal waste. You need to read the sticky topic which highlights some basic tests you need to make and provide the results with your post. It is difficult at best to identify a mineral from a photo alone.
Back to top
Reply to topic Reply with quote
Like
   

alfredo
Site Admin



Joined: 30 Jan 2008
Posts: 833


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Nov 13, 2020 10:22    Post subject: Re: gold rock  

By the information Matt has given us (metallic luster, "gold" (or rather more pale brassy in the photo), and hardness over 5.5), this is most likely PYRITE (also known as "iron pyrites", "fools' gold", etc).
Back to top
Reply to topic Reply with quote
Like
   

matt1980




Joined: 12 Nov 2020
Posts: 5
Location: Kentucky

View user's profile

Send private message

PostPosted: Nov 13, 2020 10:52    Post subject: Re: gold rock  

I read the rules. I dont carry hydrochloric acid and a graduated cylinder in my back pocket.
Back to top
Reply to topic Reply with quote
Like
   

matt1980




Joined: 12 Nov 2020
Posts: 5
Location: Kentucky

View user's profile

Send private message

PostPosted: Nov 13, 2020 10:52    Post subject: Re: gold rock  

Alfredo, thank you.
Back to top
Reply to topic Reply with quote
Like
   

Riccardo Modanesi




Joined: 07 Nov 2011
Posts: 576
Location: Milano

View user's profile

Send private message

PostPosted: Nov 13, 2020 12:31    Post subject: Re: gold rock  

Hi to everybody! I agree: pyrite or chalcopyrite if the colour trends to gold-yellow and there are bluish-green streaks of oxydation.
Greetings by Riccardo.

_________________
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
   
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 2006-2021


Powered by FMF