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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 702 matches |
| Author | Message |
|---|---|
 Topic: Tucson Shows 2023 - let the fun begin |
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| alfredo Replies: 28 Views: 3567 |
 Forum: News about shows Posted: Jan 26, 2023 15:40 Subject: Re: Tucson Shows 2023 - let the fun begin |
| Let's note too that Nature has no method for making loops of spheres like that. Spherules, whether their internal structure is radiating or concentric, start growing from a point in the center. How wo ... | |
| Topic: Tucson Shows 2023 - let the fun begin |
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| alfredo Replies: 28 Views: 3567 |
Forum: News about shows Posted: Jan 26, 2023 09:38 Subject: Re: Tucson Shows 2023 - let the fun begin |
| On line discussions of fluorite "loops" came to the conclusion that they are carvings made from the fluorite hemispheres that occur in India. Easy enough to do nowadays with the air abrasive ... | |
| Topic: Iolite and big quartz crystals from BC Canada |
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| alfredo Replies: 4 Views: 446 |
Forum: Mines and Mineral Localities Posted: Jan 25, 2023 21:56 Subject: Re: Iolite and big quartz crystals from BC Canada |
| Reminds me a lot about the Swiss "strahlers" in the Alps - same environment, same working conditions, same alpine-type quartz finds. Amazing. | |
| Topic: Cleaning Cookeite over pink Tourmaline |
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| alfredo Replies: 9 Views: 903 |
Forum: Off-Topic and Introductions Posted: Jan 15, 2023 12:47 Subject: Re: Cleaning Cookeite over pink Tourmaline |
| Get it professionally analysed and make sure it really is cookeite, and not the closely related species borocookeite! When the pink tourmalines from Malkhan in Siberia started coming out, dealers quic ... | |
| Topic: Cleaning Cookeite over pink Tourmaline |
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| alfredo Replies: 9 Views: 903 |
Forum: Off-Topic and Introductions Posted: Jan 14, 2023 00:18 Subject: Re: Cleaning Cookeite over pink Tourmaline |
| Cookeite is a member of the chlorite group, not a mica. I've dissolved other chlorites (clinochlore-chamosite) in hot sulphuric acid, but whether that would also work on cookeite, I'm not sure. | |
| Topic: Please identify. |
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| alfredo Replies: 8 Views: 879 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 12, 2023 20:01 Subject: Re: Please identify. |
| The pink ones look like rose quartz. | |
| Topic: Any Ideas? |
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| alfredo Replies: 22 Views: 2577 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 29, 2022 12:00 Subject: Re: Any Ideas? |
| Don't waste your money on a thermal conductivity "diamond tester". They are designed for use on the flat polished facets of gemstones and give very unreliable results on rough stones and cry ... | |
| Topic: Melanophlogite? |
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| alfredo Replies: 20 Views: 7410 |
Forum: What is it? - Where is it from? Posted: Dec 18, 2022 12:28 Subject: Re: Melanophlogite? |
| What you have there is concentric layers of iron oxide, nothing related to melanophlogite, chayesite, osumilite, nor cordierite. Indeed a curious rock - I'd keep it too if I found it - but nothing wit ... | |
| Topic: Found this today |
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| alfredo Replies: 14 Views: 1499 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 13, 2022 09:02 Subject: Re: Found this today |
| https://www.mindat.org/mesg-506598.html
Sorry, it's a bit facetious, but... |
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| Topic: Found this today |
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| alfredo Replies: 14 Views: 1499 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 12, 2022 20:33 Subject: Re: Found this today |
| It's not a diamond, so don't waste your money buying a diamond tester. They don't work reliably on rough surfaces anyway, they're designed for use on polished gemstone facets. | |
| Topic: Rockhounding in Israel - contact needed |
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| alfredo Replies: 18 Views: 26816 |
Forum: Rockhounding trips Posted: Dec 12, 2022 19:44 Subject: Re: Rockhounding in Israel - contact needed |
| Chalcedony/Quartz nodules are abundant on some parts of the slopes of Mt Meron, looking like cauliflower on the outside, occasionally with hollow centers. Nothing terribly exciting. | |
| Topic: Zunyite from Canada |
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| alfredo Replies: 6 Views: 1161 |
Forum: Minerals and Mineralogy Posted: Nov 30, 2022 12:54 Subject: Re: Zunyite from Canada |
| As David points out, "Silverstone" is likely an error for Silverton, and Silverton has plenty of sphalerite and chalcopyrite, which this specimen appears to be. It does not look to me like z ... | |
| Topic: Zunyite from Canada |
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| alfredo Replies: 6 Views: 1161 |
Forum: Minerals and Mineralogy Posted: Nov 28, 2022 18:38 Subject: Re: Zunyite from Canada |
| I too suspect sphalerite. | |
| Topic: Minerals to be found in only one location |
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| alfredo Replies: 10 Views: 1703 |
Forum: Minerals and Mineralogy Posted: Nov 26, 2022 20:22 Subject: Re: Minerals to be found in only one location |
| There are thousands of mineral species found at only one locality: henmilite, ferrivauxite, nikischerite, favreauite, petermegawite... to name only a few that I've happened to be looking at recently, ... | |
| Topic: How hard is it to find a new mineral species? |
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| alfredo Replies: 10 Views: 1500 |
Forum: Minerals and Mineralogy Posted: Nov 19, 2022 16:54 Subject: Re: How hard is it to find a new mineral species? |
| Around a hundred or so new mineral species are approved by the International Mineralogical Association every year. ("IMA approval" is only given after scientists have studied the material su ... | |
| Topic: Pebbles from Elba, containing... tourmaline? |
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| alfredo Replies: 4 Views: 796 |
Forum: What is it? - Where is it from? Posted: Nov 16, 2022 00:57 Subject: Re: Pebbles from Elba, containing... tourmaline? |
| Pete, does the white porcellanous matrix fluoresce dull red under SW UV light? (If so, it's probably feldspar and an aplitic or pegmatitic origin is more likely.) | |
| Topic: Mojave, California: What is It? |
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| alfredo Replies: 1 Views: 757 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Aug 19, 2022 23:20 Subject: Re: Mojave, California: What is It? |
| Perhaps not what you want to hear but, based on the color, luster, surface texture, interior bubbles, and sand incorporated into some surfaces - I think it's a beer bottle melted in a fire. I've found ... | |
| Topic: Unknown crystal |
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| alfredo Replies: 16 Views: 2791 |
Forum: What is it? - Where is it from? Posted: Aug 09, 2022 23:51 Subject: Re: Unknown crystal |
| I think John has got it! Check these photos here: https://www.mindat.org/gallery.php?loc=14241&min=549
Thanks. I am not familiar with this locality. |
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| Topic: Unknown crystal |
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| alfredo Replies: 16 Views: 2791 |
Forum: What is it? - Where is it from? Posted: Aug 09, 2022 21:46 Subject: Re: Unknown crystal |
| Looks like barite to me. | |
| Topic: Calcite is acting strange under UV |
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| alfredo Replies: 11 Views: 2714 |
Forum: Minerals and Mineralogy Posted: Aug 08, 2022 22:33 Subject: Re: Calcite is acting strange under UV |
| I agree with Joseph that the little tabular white crystals are stilbite. | |
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