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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 40 matches |
| Author | Message |
|---|---|
 Topic: Location in Romania |
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| Linus Replies: 5 Views: 2115 |
 Forum: What is it? - Where is it from? Posted: Sep 30, 2021 17:31 Subject: Re: Location in Romania |
| just ran across this:
Boița is a commune in Sibiu County, Transylvania, Romania, at the foothills of the Cindrel Mountains, 22 km south of the county capital Sibiu |
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| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 24, 2021 14:52 Subject: Re: Black, metallic, yellow oxide? |
| Yes indeed. I'm trying to get some documentation on its possible whereabouts, but we'll have to see how that goes. | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 23, 2021 17:36 Subject: Re: Black, metallic, yellow oxide? |
| I'm debating on the Connecticut provenance though, could also be Rwanda, Uganda... I'm hoping I may be able to tie that down too. You guys have been very helpful. I'm about 95% convinced on the specie ... | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 23, 2021 17:34 Subject: Re: Black, metallic, yellow oxide? |
| with precious little info, I think you did great, than you! | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 22, 2021 16:58 Subject: Re: Black, metallic, yellow oxide? |
| ... one of Rob's pieces... (oh and the yellow may be tungstite or similar...
"Ferberite Pseudomorph after Scheelite Ferberite Pseudomorph after Scheelite from Trumbull, Fairfield Co., Connect ... |
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| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 22, 2021 15:30 Subject: Re: Black, metallic, yellow oxide? |
| ferberrite ps scheelite??? | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 22, 2021 15:20 Subject: Re: Black, metallic, yellow oxide? |
| well, we are closing in on it. XRF (Niton XL5) shows strong tungsten and iron... see the pic. | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 20:37 Subject: Re: Black, metallic, yellow oxide? |
| Hi Bob, I think youre right about the orthorhombic, but the streak and pronounced cleavages suggest other than brookite... I think we're closing in on it! | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 19:24 Subject: Re: Black, metallic, yellow oxide? |
| oh, and the whitish spots in the picture look to me slightly aplitic, they fluoresce a weak tan-yellow. | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 19:21 Subject: Re: Black, metallic, yellow oxide? |
| Sort of cubic, but there is a flattening at the pyramid base that is offset versus the opposite side, so maybe not cubic? (I haven't had mineralogy in about 40 yrs). It is noticeably heavy. I may be a ... | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 17:31 Subject: Re: Black, metallic, yellow oxide? |
| Hardness is between 4 and 5 (done with hardness points) and it seems to have at least three pronounced cleavage planes... so probably not franklinite. It is not fluorescent. | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 16:12 Subject: Re: Black, metallic, yellow oxide? |
| Matt, I think Franklinite is an excellent guess... I'll play with a bit more. | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 16:01 Subject: Re: Black, metallic, yellow oxide? |
| I stated it was non magnetic, very strong cleavage too, as shown, almost looks like carbonate type cleavage... | |
| Topic: Black, metallic, yellow oxide? |
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| Linus Replies: 24 Views: 6198 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 14:51 Subject: Black, metallic, yellow oxide? |
| Hi All! This is one I probably should know, but its not registering.
pyramidal, Black, sparkly metallic on broken surfaces, strong cleavage, non-magnetic, larger broken surfaces that cut across the c ... |
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| Topic: Fluorite Santa Eulalia |
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| Linus Replies: 3 Views: 1820 |
Forum: What is it? - Where is it from? Posted: Apr 10, 2021 18:15 Subject: Re: Fluorite Santa Eulalia |
| Hi Peter, so did all those pieces come from Mina Carmen? | |
| Topic: Fluorite Santa Eulalia |
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| Linus Replies: 3 Views: 1820 |
Forum: What is it? - Where is it from? Posted: Apr 10, 2021 15:00 Subject: Fluorite Santa Eulalia |
| I recently came across a couple old pieces from this great locality. This one is clearly "Fluorite ps Calcite" but I am not sure whether it is from "West Camp" or from "Mina E ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| Linus Replies: 21 Views: 7479 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 16:48 Subject: Re: Unusual bar pyrite from Nanisivik |
| i.e. bottom: Mar 23, 2013 by Pete Richards | |
| Topic: Unusual bar pyrite from Nanisivik |
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| Linus Replies: 21 Views: 7479 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 16:46 Subject: Re: Unusual bar pyrite from Nanisivik |
| Actually there are some interesting thoughts on this at:
https://www.mineral-forum.com/message-board/viewtopic.php?t=2980 of this forum. Look down towards the bottom. |
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| Topic: Unusual bar pyrite from Nanisivik |
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| Linus Replies: 21 Views: 7479 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 15:05 Subject: Re: Unusual bar pyrite from Nanisivik |
| I recall that the Buick Mine in Missouri was very famous for rectangular pyrites, some up to 12 inchs long! The "Virtual Museum of Geology" website mentions that many of these had holes down ... | |
| Topic: Blue Lace Agate from Ysterputs, Southern Namibia - (31) |
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| Linus Replies: 4 Views: 6661 |
Forum: Featured Columns of FMF Posted: May 28, 2020 14:29 Subject: Re: Blue Lace Agate from Ysterputs, Southern Namibia - (31) |
| Thanks vey much for this article! Ive always been a fan of the Blue Lace and I mourn the idling of the Mine. | |
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