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04 Jul-15:41:39 The mizunaka collection - chrysocolla (Am Mizunaka)
04 Jul-11:31:17 Re: collection of michael shaw (Michael Shaw)
04 Jul-08:25:59 Re: the mim museum in beirut, lebanon (Mim Museum)
04 Jul-07:22:13 Re: collection of volkmar stingl (Volkmar Stingl)
04 Jul-04:00:39 Re: new generation for picture - ploum (Tobi)
03 Jul-11:46:17 Re: nature used 57 recipes to create earth's ~10,500+ minerals! (Peter Lemkin)
03 Jul-11:31:17 Nature used 57 recipes to create earth's ~10,500+ minerals! (Peter Lemkin)
03 Jul-09:43:04 Re: collection of michael shaw (Michael Shaw)
03 Jul-06:04:41 Re: new generation for picture - ploum (Ploum)
02 Jul-14:58:25 The mizunaka collection - calcite with pyrite (Am Mizunaka)
02 Jul-14:44:48 Sainte-marie-aux-mines 2022 - the new discoveries (1) (Jordi Fabre)
01 Jul-16:16:08 Re: pyromorphite and ...? (Colin Robinson)
01 Jul-13:56:47 Re: twinned topaz? (John S. White)
01 Jul-12:20:34 Re: pyromorphite and ...? (Forrestblyth)
01 Jul-11:34:01 Re: caldbeck cumbria mineral (Forrestblyth)
01 Jul-11:25:31 Re: pyromorphite and ...? (Forrestblyth)
01 Jul-10:32:27 Re: twinned topaz? (Bob Carnein)
01 Jul-10:17:29 Re: collection of volkmar stingl (Volkmar Stingl)
01 Jul-10:15:24 Re: twinned topaz? (Yannick Cosson)
01 Jul-08:51:24 Re: twinned topaz? (Pete Richards)
01 Jul-07:43:29 Re: twinned topaz? (Josele)
01 Jul-06:38:46 Re: twinned topaz? (Bob Morgan)
01 Jul-05:07:43 Twinned topaz? (Yannick Cosson)
30 Jun-23:13:16 The mizunaka collection - fluorite (Am Mizunaka)
30 Jun-16:35:12 Re: pyromorphite and ...? (Colin Robinson)

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  Topic: Is this quartz or polylithionite?
Ken

Replies: 0
Views: 390

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 07, 2022 22:19   Subject: Is this quartz or polylithionite?
I had an xrd analysis done on this specimen to help ID it. I had them run the two different colors separate. According to the analysis the brownish area comes up as 98% quartz and
2% corundum and th ...
  Topic: Jade, chalcedony or????
Ken

Replies: 7
Views: 1059

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 07, 2022 21:58   Subject: Re: Jade, chalcedony or????
I don't have a clue as to what the test picks are made of but all the ones that I've seen used look like the ones in the photo below. I've had a few specimens tested by geologist and gemologist and th ...
  Topic: Jade, chalcedony or????
Ken

Replies: 7
Views: 1059

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 06, 2022 23:30   Subject: Re: Jade, chalcedony or????
I thought the hardness was a bit high too, but it was confirmed by two geologists, if you try to scratch it with a #7 test pick it will just leave a silver mark that you can wipe away with your finger ...
  Topic: Jade, chalcedony or????
Ken

Replies: 7
Views: 1059

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 05, 2022 22:43   Subject: Jade, chalcedony or????
I've taken this stone into museums, universities and even to about 3 different rock/mineral shows, and no one can say for sure what this is. When they first see it, most will say it's some sort of alt ...
  Topic: Why would crystals be inside of pyrite
Ken

Replies: 9
Views: 998

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 05, 2022 22:25   Subject: Re: Why would crystals be inside of pyrite
The cross might perhaps be a "Japan-law twin", like these: https://www.mindat.org/photo-656770.html
Cool, thanks very much for the info.
  Topic: Why would crystals be inside of pyrite
Ken

Replies: 9
Views: 998

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 04, 2022 23:29   Subject: Re: Why would crystals be inside of pyrite
Just curious, what crystal shape would that little cross be classified as, would that be what's called a twin?
  Topic: Why would crystals be inside of pyrite
Ken

Replies: 9
Views: 998

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 03, 2022 23:36   Subject: Re: Why would crystals be inside of pyrite
A drop of vinegar would solve the problem.
But I doubt that Mr. Ken has kept those crystals for such a long time.
I was crushing the pyrite to do some acid testing and I have seen them from time to ...
  Topic: Why would crystals be inside of pyrite
Ken

Replies: 9
Views: 998

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 02, 2022 22:41   Subject: Why would crystals be inside of pyrite
I've come across several small crystals, these were found inside of pyrite that I was crushing to use in acid testing. They are less than one mm in size and less than half a mm in height. I have no id ...
  Topic: Not sure what to make of this stone
Ken

Replies: 2
Views: 1648

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 23, 2021 22:09   Subject: Re: Not sure what to make of this stone
I looked at a lot of green mineral searching for a match and never came across epidote. Looks like a good match so I do think you may be right, cool, thanks.
  Topic: Not sure what to make of this stone
Ken

Replies: 2
Views: 1648

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 18, 2021 21:29   Subject: Not sure what to make of this stone
This stone looks like it two types of minerals that make up one stone. It almost looks as if part of this stone has morphed, how common is this? I'm not sure as to what to label this stone as. Any ide ...
  Topic: Is this still quartz??
Ken

Replies: 7
Views: 2913

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 15, 2021 22:52   Subject: Re: Is this still quartz??
It's one rock with two different look. It has a hardness of 7.0 and no part reacts with acid. This rock was found in the California desert east of LA. There's mountain that has a slot cut into by rain ...
  Topic: Is this still quartz??
Ken

Replies: 7
Views: 2913

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 13, 2021 22:19   Subject: Is this still quartz??
I can't find anything that looks like this stone. It appears to be a piece of quartz that has undergone some sort of modification. It's the strangest looking quartz I've ever come across, anyone ever ...
  Topic: Magnetic serpentine?
Ken

Replies: 2
Views: 1563

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 09, 2021 23:10   Subject: Re: Magnetic serpentine?
You're right about there being a lot of magnetite in that area, I do recall seeing a good deal of it around there. Thanx for the reply.
  Topic: Magnetic serpentine?
Ken

Replies: 2
Views: 1563

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 07, 2021 21:45   Subject: Magnetic serpentine?
These stones all have a hardness of about 3.5 so I think they are serpentine. That last stone has a very odd shape, took me a while to figure it out. I've read that the magnetism is caused by magnetit ...
  Topic: A neat little quartz crystal
Ken

Replies: 1
Views: 1949

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 16, 2020 21:58   Subject: A neat little quartz crystal
I'm not searching for any answers with this one, I just wanted to share what I think is a really neat crystal. This was dug out of a piece of breccia, to the naked eye it looks like it's something tha ...
  Topic: Is this still quartz?
Ken

Replies: 10
Views: 4670

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 15, 2020 01:52   Subject: Re: Is this still quartz?
Interesting. Have we suggested that you find a local rockshop/rock club/college geology department that you can take your unknowns to and ask around? I think that would be the best way for you to ma ...
  Topic: What mineral is this?????
Ken

Replies: 9
Views: 4054

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 15, 2020 01:43   Subject: Re: What mineral is this?????
I thought for sure this was some sort of paint, but you can't scrape it off, can't burn it off, and it has no reaction to acid. You have to pry it or chisel it off and when you do, some of the quartz ...
  Topic: What mineral is this?????
Ken

Replies: 9
Views: 4054

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 13, 2020 23:47   Subject: What mineral is this?????
I've been told that this is for sure some sort of mineral but no one can say for sure what mineral it is. I showed this to several people and like me most were clueless, I came across a geochemist at ...
  Topic: Is this still quartz?
Ken

Replies: 10
Views: 4670

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 13, 2020 23:30   Subject: Re: Is this still quartz?
Hi Matt- I guess you might say that my curiosity got the best of me. I stumbled onto some minerals that were being washed out of a mountain that were setting off my metal detector, a lot of these mine ...
  Topic: Is this still quartz?
Ken

Replies: 10
Views: 4670

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 11, 2020 22:40   Subject: Re: Is this still quartz?
How are you doing or getting these scans done?
All of the scans were paid for and done at commercial labs or universities.
Pete Richards- The metamorphism doesn't apply to this stone, there were onl ...
 
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