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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.
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| Search found 697 matches |
| Author | Message |
|---|---|
 Topic: American quartz without label |
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| Peter Megaw Replies: 4 Views: 3282 |
 Forum: What is it? - Where is it from? Posted: Jul 08, 2023 12:58 Subject: Re: American quartz without label |
| A very long time ago I collected quartz very much like this from an outcrop across from the Pride of the West Mine in the Silverton Colorado area. The black stuff was not easy to get off. | |
| Topic: An idea for a collection |
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| Peter Megaw Replies: 20 Views: 6738 |
Forum: Minerals and Mineralogy Posted: May 11, 2023 07:51 Subject: Re: An idea for a collection |
| At least 2 museums have set up exhibits based on Hazen and Co's work on Mineral Evolution. One is at the new University of Arizona Alfie Norville Mineral and Gem Museum, this exhibit traces mineral e ... | |
| Topic: A very strange specimen of Hardin Co., Illinois |
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| Peter Megaw Replies: 6 Views: 3841 |
Forum: Minerals and Mineralogy Posted: Mar 13, 2023 09:20 Subject: Re: A very strange specimen of Hardin Co., Illinois |
| I love mineralized fossils and this is great example with a cool story to tell. We tend to focus on the big deposits, but often small occurrences yield some of the better curiosities! You sent me to t ... | |
| Topic: Any Ideas? |
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| Peter Megaw Replies: 22 Views: 7997 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 28, 2022 09:43 Subject: Re: Any Ideas? |
| Looks somewhat like a diamond macle | |
| Topic: Please identify this! |
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| Peter Megaw Replies: 2 Views: 2184 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Nov 21, 2022 19:25 Subject: Re: Please identify this! |
| We need that hardness test first please!
Betting you can't scratch it with a knife though |
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| Topic: Atlas of Spanish minerals |
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| Peter Megaw Replies: 4 Views: 5854 |
Forum: Mineralogical Literature Posted: Oct 25, 2022 10:42 Subject: Re: Atlas of Spanish minerals |
| Muchas Felicidades! Aparece un trabajo de valientes! | |
| Topic: Help ID'ing some oddities please. |
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| Peter Megaw Replies: 7 Views: 2791 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Oct 17, 2022 12:49 Subject: Re: Help ID'ing some oddities please. |
| We need a little more information than "non magnetic" ...especially hardness...I doubt you can scratch this with a pin or tip of a knife, but that would be the first test I'd recommend
Th ... |
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| Topic: Dark, metallic mystery mineral - Magnetite? Ilmenite? Hematite? |
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| Peter Megaw Replies: 8 Views: 3356 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Oct 04, 2022 13:28 Subject: Re: Dark, metallic mystery mineral - Magnetite? Ilmenite? Hematite? |
| You are right that the geology seems completely wrong for this to be a magmatic or metamorphic product. The fact that some is bubbly and some not suggests differences in how it was poured. You may b ... | |
| Topic: Dark, metallic mystery mineral - Magnetite? Ilmenite? Hematite? |
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| Peter Megaw Replies: 8 Views: 3356 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Oct 04, 2022 10:33 Subject: Re: Dark, metallic mystery mineral - Magnetite? Ilmenite? Hematite? |
| You don't need a streak plate for hematite...just scratch it with a nail and you'll see that classic red-brown color where the crystals are crushed.
But even identifying it mineralogically will on ... |
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| Topic: Calcite is acting strange under UV |
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| Peter Megaw Replies: 11 Views: 5532 |
Forum: Minerals and Mineralogy Posted: Aug 08, 2022 08:11 Subject: Re: Calcite is acting strange under UV |
| Sorry, misread locality...not Nanisivik so forget MVT
These Indian deposits are hosted in basalts...so different source and explanation, but still one of hundreds of calcite environments and fluore ... |
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| Topic: Calcite is acting strange under UV |
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| Peter Megaw Replies: 11 Views: 5532 |
Forum: Minerals and Mineralogy Posted: Aug 08, 2022 08:09 Subject: Re: calcite is acting strange under UV |
| Calcite has a very wide range of fluorescent responses stemming from a wide range of trace amounts of activators and sensitizers. This is a VERY deep rabbit hole you have headed down...
The orange ... |
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| Topic: Datolite locality question |
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| Peter Megaw Replies: 9 Views: 4103 |
Forum: What is it? - Where is it from? Posted: Jul 31, 2022 13:26 Subject: Re: Datolite locality question |
| The little green crystals in your second photo look more right for datolite | |
| Topic: Datolite locality question |
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| Peter Megaw Replies: 9 Views: 4103 |
Forum: What is it? - Where is it from? Posted: Jul 31, 2022 12:49 Subject: Re: Datolite locality question |
| I wondered that too...UV would tell too and it's nondestructive. Datolite is also harder (5+ vs 3) so a well placed pin will tell you a lot | |
| Topic: Datolite locality question |
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| Peter Megaw Replies: 9 Views: 4103 |
Forum: What is it? - Where is it from? Posted: Jul 31, 2022 12:20 Subject: Re: Datolite locality question |
| I agree with Kevin's calls on the associated species (I suspect the calcite is orange-pink fluorescent, which unfortunately doesn't narrow things down either). However, neither the habit nor the color ... | |
| Topic: Quartz confusion |
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| Peter Megaw Replies: 2 Views: 2129 |
Forum: What is it? - Where is it from? Posted: Jun 27, 2022 15:03 Subject: Re: Quartz confusion |
| Hello Nirvash, What you have is clearly a quartz crystal. When quartz is purple it is the variety amethyst. There are a range of colored quartzes, with pretty much every color getting its own name | |
| Topic: Please help ID, maybe pyrite? |
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| Peter Megaw Replies: 4 Views: 2635 |
Forum: What is it? - Where is it from? Posted: Jun 22, 2022 13:09 Subject: Re: Please help ID, maybe pyrite? |
| These are oxidized pyrite cubes. They are now some form of hydrated iron oxide... You can call them "goethite pseudomorphs after pyrite". These are called "limonite dice" in the s ... | |
| Topic: Weird Mineral, River Find |
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| Peter Megaw Replies: 4 Views: 2460 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 31, 2022 11:52 Subject: Re: Weird Mineral, River Find |
| Thanks for posting. There is a guide on the home page to features we like to see to help make identifications, please check it out so you can get an idea how hardness, streak etc. help.
That said, ... |
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| Topic: Mineral Label Translation |
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| Peter Megaw Replies: 8 Views: 3440 |
Forum: What is it? - Where is it from? Posted: May 11, 2022 13:16 Subject: Re: Mineral Label Translation |
| Danke Sehr | |
| Topic: Mineral Label Translation |
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| Peter Megaw Replies: 8 Views: 3440 |
Forum: What is it? - Where is it from? Posted: May 11, 2022 10:40 Subject: Re: Mineral Label Translation |
| Schafstiel = sheep stem or sheep stalk = ram's horn? Would fit the shape | |
| Topic: Help needed regarding first emerald |
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| Peter Megaw Replies: 2 Views: 1754 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Apr 13, 2022 15:22 Subject: Re: Help needed regarding first emerald |
| Hello, We don't want to seem unfriendly, but this forum is for discussion of various non-commercial aspects of minerals and mineral collecting, we expressly do not get involved in valuations or sales. | |
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