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| Search found 14 matches |
| Author | Message |
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 Topic: Odd textures on this large beryl |
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| RussEpp Replies: 10 Views: 8721 |
 Forum: Minerals and Mineralogy Posted: Nov 25, 2020 15:37 Subject: Re: Odd textures on this large beryl |
| Definitely, a beautiful and interesting alternative to the usual smooth and lustrous pinacoid.
It's a pity you don't have information on the locality. If anyone has any ideas where it came from or ... |
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| Topic: Odd textures on this large beryl |
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| RussEpp Replies: 10 Views: 8721 |
Forum: Minerals and Mineralogy Posted: Nov 25, 2020 09:59 Subject: Re: Odd textures on this large beryl |
| This large green beryl has a termination that looks like hundreds of small mountain peaks...
Agree with Bob, that's a cool crystal which carries the memory of a tormented history. Could you perhaps ... |
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| Topic: Odd textures on this large beryl |
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| RussEpp Replies: 10 Views: 8721 |
Forum: Minerals and Mineralogy Posted: Nov 24, 2020 11:46 Subject: Re: Odd textures on this large beryl |
| Thanks for the responses, the melting and etching are both plausible and interesting ideas. I initially doubted both, because it had appeared to me that the 2 textures were perfectly aligned with the ... | |
| Topic: Odd textures on this large beryl |
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| RussEpp Replies: 10 Views: 8721 |
Forum: Minerals and Mineralogy Posted: Nov 23, 2020 22:13 Subject: Odd textures on this large beryl |
| This large green beryl has a termination that looks like hundreds of small mountain peaks. However, what I find really interesting is that 3 contiguous sides are smooth and 3 have a much rougher but d ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 31, 2020 09:49 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. Some of rectangular fluorites ... |
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| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 19:21 Subject: Re: Unusual bar pyrite from Nanisivik |
| Hi Bob, Thanks for the reference. The 1995 article in the Min Rec by Pete Richards et al suggests that bars composed of single crystals are usually millimeter sized and the few larger bars that have b ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 18:33 Subject: Re: Unusual bar pyrite from Nanisivik |
| Your sample is definitely not pyrite over marcasite. I have several elongated specimens from there, one a bunch of simi aligned bars that compose a tube, another that is a pseudomorph of elongated mar ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 17:00 Subject: Re: Unusual bar pyrite from Nanisivik |
| Thanks David , I understand much better now. I really like the Nanisivik pyrites for their complexity of forms and variety. By the way, I have collected many marcasite clusters from the Stony Mountai ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 16:22 Subject: Re: Unusual bar pyrite from Nanisivik |
| I was referring to the furthest right pyrite on the right of the specimen. Figure 29, is, in fact, very thick overgrowths on a former pseudomorph. DKJ
. Actually, According to the 1990 MinRec artic ... |
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| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 15:57 Subject: Re: Unusual bar pyrite from Nanisivik |
| Thanks all for your responses. I have looked at a number of photos of pyrite bars from the Buick Mine, Missouri and they appear to be quite different. While some of them get quite long, they have a pl ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 15:21 Subject: Re: Unusual bar pyrite from Nanisivik |
| Thanks David for the detailed reply and the references. I wasn't aware of the MinRec article and am fortunate to have that issue. The aggregate you were referring to on the right hand of the specimen ... | |
| Topic: Unusual bar pyrite from Nanisivik |
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| RussEpp Replies: 21 Views: 14524 |
Forum: Minerals and Mineralogy Posted: Oct 29, 2020 12:20 Subject: Unusual bar pyrite from Nanisivik |
| This specimen has prominent rectangular-shaped pyrite crystals. What are the geological conditions that would cause this to occur? The main crystals are 9mm thick and up to 29mm long. | |
| Topic: Very steep rhombohedral calcite? |
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| RussEpp Replies: 14 Views: 13449 |
Forum: Minerals and Mineralogy Posted: Oct 27, 2020 19:37 Subject: Re: Very steep rhombohedral calcite? |
| This Chinese specimen has hundreds of identical crystals, all with the same form, including a prominent double terminated crystal in the center which is 3.1 cm long. The only location I have for this ... | |
| Topic: Presentation of new members - Reference Thread |
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| RussEpp Replies: 501 Views: 567275 |
Forum: Off-Topic and Introductions Posted: Oct 27, 2020 19:11 Subject: Presentation of new members - Russ Epp from Manitoba, Canada |
| Hello, My name is Russ Epp and I live in the province of Manitoba, Canada. I have been collecting since I was young and recently retired so now I have more time to devote to my various hobbies. I col ... | |
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