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20 Jun-15:26:42 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
20 Jun-15:18:37 Re: favourite barytes? (Bob Harman)
20 Jun-14:06:36 Re: virtual shows: what's the concept? (Cascaillou)
19 Jun-15:10:35 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
19 Jun-12:45:26 Re: collection of volkmar stingl (Volkmar Stingl)
18 Jun-13:54:07 Re: virtual shows: what's the concept? (Bob Harman)
18 Jun-12:05:04 Re: virtual shows: what's the concept? (James Catmur)
18 Jun-10:14:30 Re: where can i find some bio on gilbert gauthier? (Roger Warin)
18 Jun-08:55:35 Virtual shows: what's the concept? (Cascaillou)
18 Jun-06:55:44 Re: mineral spirituality? (Cascaillou)
17 Jun-22:41:26 Re: collection of volkmar stingl (Volkmar Stingl)
17 Jun-22:09:17 Re: don lum collection (Volkmar Stingl)
17 Jun-17:03:23 Re: don lum collection (Don Lum)
17 Jun-16:11:13 Re: the mizunaka collection - quartz (Am Mizunaka)
17 Jun-15:57:24 Re: where can i find some bio on gilbert gauthier? (Pub1tzu)
17 Jun-15:44:54 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
17 Jun-15:25:33 Re: collection of firmo espinar (Firmo Espinar)
17 Jun-15:21:33 Re: where can i find some bio on gilbert gauthier? (Jordi Fabre)
17 Jun-13:17:18 Re: mineral specimens with inclusions (Eck Noch)
17 Jun-13:15:34 Re: mineral specimens with inclusions - (28) (Eck Noch)
17 Jun-13:12:21 Re: mineral specimens with inclusions - (28) (Eck Noch)
17 Jun-12:10:36 Re: where can i find some bio on gilbert gauthier? (Max Merlo)
17 Jun-10:44:55 Where can i find some bio on gilbert gauthier? (Pub1tzu)
17 Jun-10:33:34 Re: favourite quartzes? (Eck Noch)
17 Jun-10:18:06 Re: favourite quartzes? (Eck Noch)

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  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 14, 2021 09:55   Subject: Re: Unknown mineral from Pikes Peak pegmatite
I tried scratching a very flat rhombohedron face on a "Herkimer diamond", and the unknown mineral left some powder and a VERY faint scratch.
  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 14, 2021 09:46   Subject: Re: Unknown mineral from Pikes Peak pegmatite
I thought of barylite too, but specimens shown on Mindat have a pretty consistent "look" to them, and none look like this crystal.
  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 13, 2021 20:43   Subject: Re: Unknown mineral from Pikes Peak pegmatite
Harder than steel.
  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 13, 2021 18:20   Subject: Re: Unknown mineral from Pikes Peak pegmatite
I did try fluorescence, and there is none, in either SW or LW. However, I played around with the lighting, and there is a single fairly planar crack that appears to be perpendicular to the long axis ...
  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 13, 2021 16:05   Subject: Re: Unknown mineral from Pikes Peak pegmatite
Thanks. I thought about danburite, but the striations still stump me.
  Topic: Unknown mineral from Pikes Peak pegmatite
Bob Carnein

Replies: 21
Views: 949

PostForum: What is it? - Where is it from?   Posted: Jun 13, 2021 15:38   Subject: Unknown mineral from Pikes Peak pegmatite
A friend asked me to identify this crystal. He found it in a Pikes Peak pegmatite near Lake George, CO. The pegmatite has amazonite, smoky quartz, zircon, and abundant massive topaz surrounded by mi ...
  Topic: Collection of Shawn Spink
Bob Carnein

Replies: 15
Views: 956

PostForum: Collection photos and Collector's page   Posted: May 13, 2021 18:15   Subject: Re: Collection of Shawn Spink
I'm always glad to help, as are most members of the forum. However, there are some basic tests you should conduct yourself before posting "unknowns". Otherwise, we waste a lot of time with ...
  Topic: Calcite form
Bob Carnein

Replies: 6
Views: 866

PostForum: Minerals and Mineralogy   Posted: Apr 25, 2021 10:24   Subject: Re: Calcite form
Although I have no idea what the actual Miller indices are, I agree with your assignment of faces to those forms.
  Topic: Soon 15 years of FMF and how to achieve many more
Bob Carnein

Replies: 20
Views: 2380

PostForum: Comments & Suggestions   Posted: Apr 21, 2021 13:52   Subject: Re: Soon 15 years of FMF and how to achieve many more
Thank you for your dedication to this very worthwhile project.
  Topic: Tucson - 2021 April
Bob Carnein

Replies: 25
Views: 5311

PostForum: Mineral Shows   Posted: Apr 19, 2021 18:00   Subject: Re: Tucson - 2021 April
Wow! Too many zeroes for my budget??
  Topic: Green, purple, white and orthoclase conglomerate?
Bob Carnein

Replies: 3
Views: 542

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Apr 19, 2021 09:45   Subject: Re: Green, purple, white and orthoclase conglomerate?
The "triangular shaped vitreous" material looks like fluorite. What you're seeing may be the cleavage, which produces triangular crack patterns. Note that fluorite isn't always purple or b ...
  Topic: Please help to get to know the type of this rock
Bob Carnein

Replies: 13
Views: 1445

PostForum: What is it? - Where is it from?   Posted: Apr 05, 2021 16:01   Subject: Re: Please help to get to know the type of this gem
Can you tell us where you found it or how you acquired it? Offhand, it looks like a tektite; If you use a strong light, is it all translucent? If so, what color is it? Did you reverse the hardness ...
  Topic: Found My First Topaz
Bob Carnein

Replies: 10
Views: 1673

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Mar 27, 2021 18:37   Subject: Re: Found My First Topaz
Perfect cleavage and crystal habit both support your ID! Congratulations.
  Topic: Natural or man-made?
Bob Carnein

Replies: 6
Views: 1427

PostForum: What is it? - Where is it from?   Posted: Mar 13, 2021 12:22   Subject: Re: Natural or man-made?
There are different degrees of "man made" and "natural". Some turquoise is synthetic and has essentially the same composition as the natural stone. Some turquoise is "stabil ...
  Topic: Alabama Copper? Quartz or Quartzite and red to almost green mineral along with??
Bob Carnein

Replies: 4
Views: 1088

PostForum: What is it? - Where is it from?   Posted: Mar 03, 2021 11:25   Subject: Re: Alabama Copper? Quartz or Quartzite and red to almost green mineral along with??
The last photo looks like mica schist, but these pictures could have been taken in many places with similar geology. There are a half dozen mineral clubs in Alabama. Your best bet is to find a club ...
  Topic: I want to know this stone
Bob Carnein

Replies: 11
Views: 2011

PostForum: What is it? - Where is it from?   Posted: Feb 23, 2021 16:16   Subject: Re: I want to know this stone
It looks, to me, like a piece of quartzite. How did you measure the hardness?
  Topic: Help
Bob Carnein

Replies: 4
Views: 1274

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Feb 06, 2021 15:52   Subject: Re: Help
FYI, the lighter material filling the "cracks" in the concretion is typically the mineral calcite and is often fluorescent in ultraviolet light. Fluorescent specimens are their own collecti ...
  Topic: Metallic / crystalline flat beach find.
Bob Carnein

Replies: 3
Views: 941

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 29, 2021 16:17   Subject: Re: Metallic / crystalline flat beach find.
This looks like a piece of garnet-mica schist. Are the dark pieces harder than glass or a knife blade? Based on your photos, I think the "sparkly" stuff is most likely muscovite mica.
  Topic: When the Financial Times talks about minerals
Bob Carnein

Replies: 3
Views: 6922

PostForum: Comments & Suggestions   Posted: Jan 11, 2021 13:08   Subject: Re: When the Financial Times talks about minerals
Luckily, there is a place in the hobby for people who love minerals and don't care about the hype. The investor-collector community clearly has a place, but that really isn't where most of the collec ...
  Topic: This crazy mineral market!
Bob Carnein

Replies: 14
Views: 3740

PostForum: Comments & Suggestions   Posted: Jan 02, 2021 17:17   Subject: Re: This crazy mineral market!
Thank goodness the mineral market doesn't always make sense!
 
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