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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: Unknown garnet
Matt_Zukowski

Replies: 7
Views: 648

PostForum: What is it? - Where is it from?   Posted: Jun 26, 2022 20:00   Subject: Re: Unknown garnet
Can you tell us what the two minerals are that make up the matrix? Are you sure it comes from PAK?
  Topic: Quartz-diamond ..... Idk ?
Matt_Zukowski

Replies: 4
Views: 466

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 14, 2022 01:35   Subject: Re: Quartz-diamond ..... Idk ?
It sure looks like a chunk of quartz, but one cannot tell just by looking at a picture that doesn't show good crystal faces and the relations between them.

The odds that you found a diamond in your ...
  Topic: Need help identifying this rock
Matt_Zukowski

Replies: 10
Views: 890

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 18, 2022 17:29   Subject: Re: Need help identifying this rock
I agree that this is likely to be artificial. The only way i thought it could be natural is for it to be some sort of vesicular volcanic with the beads being quartz or something filling the vesicles. ...
  Topic: What is the correct name for this rock?
Matt_Zukowski

Replies: 6
Views: 860

PostForum: What is it? - Where is it from?   Posted: Mar 29, 2022 01:56   Subject: Re: What is the correct name for this rock?
I agree with Alfredo - it looks like a layered volcanic with obsidian and pumice.
  Topic: Fluorite on Galena - Locality??
Matt_Zukowski

Replies: 10
Views: 1287

PostForum: What is it? - Where is it from?   Posted: Mar 27, 2022 21:31   Subject: Re: Fluorite on Galena - Locality??
My initial reaction is Naica, but the pic looks a little too blurry to me to really see the habit of either the fluorite or galena. You may get a better response if you provide some closeups of both ...
  Topic: is this pyrite?
Matt_Zukowski

Replies: 13
Views: 2011

PostForum: What is it? - Where is it from?   Posted: Mar 13, 2022 18:13   Subject: Re: is this pyrite?
Michael Shaw pulled out an amazingly similar photo to your piece suggesting that it may well be titanium (good catch Michael!). If i *had* to guess, i would say that that is what it is. But it is st ...
  Topic: Quartz Crystals Quality
Matt_Zukowski

Replies: 9
Views: 1754

PostForum: Off-Topic and Introductions   Posted: Feb 12, 2022 17:18   Subject: Re: Quartz Crystals Quality
Am I the only one frustrated by this thread? Some guy shows us a box of broken up quartz rock, lists a bunch of characteristics that are mostly, seemingly just generic for quartz, and asks us if this ...
  Topic: Idk what it is
Matt_Zukowski

Replies: 6
Views: 1113

PostForum: What is it? - Where is it from?   Posted: Feb 01, 2022 15:52   Subject: Re: Idk what it is
You should look at your pictures before you post them. They are impossibly blurry.

That said - it is probably pyrite. To learn more about pyrite, go to the mindat page on pyrite:
https://www.min ...
  Topic: Hawaiian Minerals
Matt_Zukowski

Replies: 7
Views: 1786

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 10, 2021 10:41   Subject: Re: Hawaiian Minerals
A good website that you may not know about is Mindat. You can look up any mineral and learn all about it, find all the minerals reported in a particular locality like a single mine or a state, and ma ...
  Topic: Is honey calcite real?
Matt_Zukowski

Replies: 2
Views: 962

PostForum: Off-Topic and Introductions   Posted: Dec 06, 2021 15:07   Subject: Re: Is honey calcite real?
I have never heard the term "honey calcite" before, but there is plenty of honey-colored calcite around. If you are concerned, do an acid test to see if it is calcite.
  Topic: Please help identify the composition of this granite
Matt_Zukowski

Replies: 8
Views: 2745

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 25, 2021 23:04   Subject: Re: Please help identify the composition of this granite
The mottled grey mineral in 20211025_215604.jpg and 20211025_215836.jpg is quartz.

The golden platy mineral in 20211025_215743.jpg and 20211025_215815.jpg is muscovite.

The black platy-looking m ...
  Topic: Some beautiful obsidian like rocks
Matt_Zukowski

Replies: 6
Views: 2133

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 20, 2021 08:48   Subject: Re: Some beautiful obsidian like rocks
These are probably glass slag.
  Topic: Article on Naica and Gypsum
Matt_Zukowski

Replies: 4
Views: 2091

PostForum: Mineralogical Literature   Posted: Oct 14, 2021 03:18   Subject: Article on Naica and Gypsum
I just read this article and thought it would be of general interest to this group. I especially like the picture from Pulpí, Spain.
https://cen.acs.org/physical-chemistry/geochemistry/Naicas-crysta ...
  Topic: Location in Romania
Matt_Zukowski

Replies: 5
Views: 2242

PostForum: What is it? - Where is it from?   Posted: Sep 30, 2021 16:28   Subject: Re: Location in Romania
What else in on the piece. Is the orange stuff orpiment? There is some off-white/maybe yellowish material, is this quartz?
  Topic: Will Barite save the world?
Matt_Zukowski

Replies: 15
Views: 3977

PostForum: Off-Topic and Introductions   Posted: Sep 24, 2021 08:53   Subject: Re: Will Barite save the world?
Like Lluis and Alfredo, my first impression was that this sounds like snake oil. But the authors are at good universities (MIT and Purdue) and the paper was published in a good peer-reviewed journal. ...
  Topic: Sold as “Green stilbite”
Matt_Zukowski

Replies: 11
Views: 3540

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 15, 2021 22:29   Subject: Re: Sold as “Green stilbite”
Sometimes stilbite can present with chlorite inclusions, but your piece doesn't look like any of this material that i have seen. That said, all i have is to go on is one picture, so perhaps my impres ...
  Topic: Fulgurite
Matt_Zukowski

Replies: 8
Views: 2613

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 15, 2021 09:59   Subject: Re: Fulgurite
I doubt we will be able to help you further. I recommend you go to a Univ or museum and talk to someone in person with the rock in hand.
  Topic: Pyrite From Gavorrano?
Matt_Zukowski

Replies: 14
Views: 3795

PostForum: What is it? - Where is it from?   Posted: Aug 24, 2021 21:26   Subject: Re: Pyrite From Gavorrano?
If the dealer is still active, why not contact them and ask why they think it is Tuscan?
  Topic: Fluorite from where?
Matt_Zukowski

Replies: 10
Views: 3229

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 18, 2021 13:55   Subject: Re: Fluorite from where?
Could be from many localities. Can you constrain the locality? Is it likely from Europe, or could it be from anywhere in the world?
  Topic: Other Minerals with this Hematite Crystal
Matt_Zukowski

Replies: 6
Views: 2191

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 13, 2021 10:50   Subject: Re: Other Minerals with this Hematite Crystal
If you know the locality, you can go to the mindat page for that locality, and look through pictures of specimens with their identified minerals from that locality.
 
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