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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.
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| Search found 247 matches |
| Author | Message |
|---|---|
 Topic: Please help me identify this stone |
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| Bob Carnein Replies: 2 Views: 1161 |
 Forum: What is it? - Where is it from? Posted: May 23, 2025 09:30 Subject: Re: Please help me identify this stone |
| Where is it from? | |
| Topic: Quartz Twins |
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| Bob Carnein Replies: 6 Views: 2731 |
Forum: Minerals and Mineralogy Posted: May 07, 2025 09:39 Subject: Re: Quartz Twins |
| Thanks so much to Bob and Pete for their insights. My top priority is clearing away 16 inches of fresh snow, but when I finish, I'll check some of the questions. In the meantime, I appreciate the co ... | |
| Topic: Quartz Twins |
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| Bob Carnein Replies: 6 Views: 2731 |
Forum: Minerals and Mineralogy Posted: May 05, 2025 12:41 Subject: Quartz Twins |
| Considering the great recent "Rocks & Minerals" articles by Carl Francis and Pete Richards on quartz twins, I will post a few specimens from my collection. | |
| Topic: Ghost dendrite |
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| Bob Carnein Replies: 7 Views: 2299 |
Forum: Minerals and Mineralogy Posted: May 02, 2025 18:22 Subject: Re: Ghost dendrite |
| I'm curious to know whether the cabochon has been regularly or continuously exposed to light. Also, it's interesting that no change occurred to the more opaque inclusions to the upper right. It mig ... | |
| Topic: An interesting 10 inch multi mineral Blackdene plate |
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| Bob Carnein Replies: 4 Views: 1820 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 05, 2025 09:52 Subject: Re: An interesting 10 inch multi mineral Blackdene plate |
| James is right. The crystal habit appears to be that of calcite. | |
| Topic: A true morphological twin of quartz according to the Dauphiné law. |
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| Bob Carnein Replies: 5 Views: 3410 |
Forum: What is it? - Where is it from? Posted: Mar 04, 2025 16:47 Subject: Re: A true morphological twin of quartz according to the Dauphiné law. |
| Thank you. I'll check that out. | |
| Topic: A true morphological twin of quartz according to the Dauphiné law. |
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| Bob Carnein Replies: 5 Views: 3410 |
Forum: What is it? - Where is it from? Posted: Mar 03, 2025 12:01 Subject: Re: A true morphological twin of quartz according to the Dauphiné law. |
| Pete, Can you possibly send a reference (for those of us who are twin fans but not experts) to a Dauphine contact twin? If there are two different "Dauphine" twin laws (contact and penetrat ... | |
| Topic: Stellerite specimens from Piedra Parada, Mexico |
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| Bob Carnein Replies: 8 Views: 4776 |
Forum: Minerals and Mineralogy Posted: Feb 20, 2025 11:55 Subject: Re: Stellerite specimens from Piedra Parada, Mexico |
| Thanks, Herwig, for reminding readers of the usefulness of POL. It's unfortunate that there's so much money floating around that we have mostly abandoned this very useful and inexpensive process. I ... | |
| Topic: Mineral Identification Question |
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| Bob Carnein Replies: 23 Views: 18032 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 09, 2025 10:51 Subject: Re: Mineral Identification Question |
| If you aren't willing to do any testing, it seems you are wasting our time. | |
| Topic: I’ve exhausted all local help! Please help me identify this? |
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| Bob Carnein Replies: 4 Views: 3014 |
Forum: What is it? - Where is it from? Posted: Feb 06, 2025 16:14 Subject: Re: I’ve exhausted all local help! Please help me identify this? |
| That looks synthetic (man made) to me. | |
| Topic: Unknown banded mineral from shores of lake Buttermere, Cumbria. UK |
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| Bob Carnein Replies: 5 Views: 2795 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 06, 2025 10:36 Subject: Re: Unknown banded mineral from shores of lake Buttermere, Cumbria. UK |
| In order to ID this, you should tell us the hardness (can you scratch it with a fingernail; does it scratch a piece of glass or a knife blade; etc.) and powder a sample and put the powder in some hot ... | |
| Topic: My question regarding natural almandine garnet |
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| Bob Carnein Replies: 1 Views: 1625 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 24, 2025 21:45 Subject: Re: My question regarding natural almandine garnet |
| Not the "exact same form". Chrysoberyl is orthorhombic and almandine is isometric. There is no overlap between the crystal forms of the two. Although you might think some chyrsoberyl rese ... | |
| Topic: Limonitized garnet? |
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| Bob Carnein Replies: 36 Views: 13309 |
Forum: What is it? - Where is it from? Posted: Jan 24, 2025 11:24 Subject: Re: Limonitized garnet? |
| OK, these certainly look like a simple rhombic dodecahedron. | |
| Topic: Limonitized garnet? |
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| Bob Carnein Replies: 36 Views: 13309 |
Forum: What is it? - Where is it from? Posted: Jan 23, 2025 16:19 Subject: Re: Limonitized garnet? |
| I agree with the foregoing. But I also think the second photo shows a flat (more or less) face perpendicular to what would be a 4-fold symmetry axis of the rhomb dodecahedron. This would be a cube ( ... | |
| Topic: Limonitized garnet? |
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| Bob Carnein Replies: 36 Views: 13309 |
Forum: What is it? - Where is it from? Posted: Jan 22, 2025 10:53 Subject: Re: Limonitized garnet? |
| The second photo looks to me like a combination cube and octahedron (that would have 14 faces), which would not be found in garnet. If that's the case, it's likely a pyrite crystal that has been repl ... | |
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