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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 29 matches |
| Author | Message |
|---|---|
 Topic: Cleaning a hematite rose |
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| Robson Vieira Replies: 1 Views: 77 |
 Forum: Conserving, Preparing and Cleaning Minerals Posted: Jan 13, 2025 14:37 Subject: Cleaning a hematite rose |
| Hello everyone.
Recently I own a nice hematite rose with specular luster. Even though I'm happy with the sample I would like to know if I can enhance some spots that continues with iron oxide coatin ... |
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| Topic: Altered quartz or pseudomorph? |
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| Robson Vieira Replies: 7 Views: 2981 |
Forum: What is it? - Where is it from? Posted: Jul 29, 2024 14:36 Subject: Re: Altered quartz or pseudomorph? |
| This may be a sand crystal, perhaps of feldspar.
Do you mean a feldspar with quartz granular content? A Sandy feldspar? |
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| Topic: Altered quartz or pseudomorph? |
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| Robson Vieira Replies: 7 Views: 2981 |
Forum: What is it? - Where is it from? Posted: Jul 29, 2024 14:34 Subject: Re: Altered quartz or pseudomorph? |
| It could be an epimorph (where one mineral coats another one) of a cubic mineral
Thanks your guess. Any tip to figure out the cubic one? |
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| Topic: Altered quartz or pseudomorph? |
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| Robson Vieira Replies: 7 Views: 2981 |
Forum: What is it? - Where is it from? Posted: Jul 28, 2024 15:54 Subject: Altered quartz or pseudomorph? |
| Hi,
I collected this sample in an ignimbrite quarry. As you can see it is an agglomerate of non-crystalized quartz, but I wonder the sample is crystalized itself, because the stuff seems a sandstone ... |
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| Topic: Where are these Brazilian minerals from? |
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| Robson Vieira Replies: 1 Views: 1411 |
Forum: What is it? - Where is it from? Posted: Jul 14, 2024 15:36 Subject: Where are these Brazilian minerals from? |
| Hello friends. Everything in my beloved Brazil is labeled as Minas Gerais, but I'm a precision locality addict. So, I attached some pictures of four samples I just received, with no label or doubtful ... | |
| Topic: Provide Miller indices in practice please |
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| Robson Vieira Replies: 11 Views: 3507 |
Forum: Minerals and Mineralogy Posted: May 30, 2024 09:49 Subject: Re: Provide Miller indices in practice please |
| Hi folks,
I'm really thankful you all by your attention. Make me clear the question. See you later. Robson |
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| Topic: Provide Miller indices in practice please |
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| Robson Vieira Replies: 11 Views: 3507 |
Forum: Minerals and Mineralogy Posted: May 30, 2024 09:47 Subject: Re: Provide Miller indices in practice please |
| Robson: I think you get the point. Yes, it would be helpful if you post a photograph of your crystal. It would also be helpful to break the crystal, but I'm sure you won't want to do that!!
Anoth ... |
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| Topic: Provide Miller indices in practice please |
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| Robson Vieira Replies: 11 Views: 3507 |
Forum: Minerals and Mineralogy Posted: May 23, 2024 12:59 Subject: Re: Provide Miller indices in practice please |
| Hi there,
It's True. I think I get the idea. I'd better to continue studying in order to achieve a higher degree of proficiency. I'm about to receive a piece which is named Euclase but I'm right it i ... |
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| Topic: Provide Miller indices in practice please |
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| Robson Vieira Replies: 11 Views: 3507 |
Forum: Minerals and Mineralogy Posted: May 21, 2024 16:01 Subject: Provide Miller indices in practice please |
| Hello my dear friends
I continue with trouble in Miller indices as a tool to ID a sample. I feel confident with the theory and I can understand the concepts and main ideas but, I can't see how I ... |
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| Topic: Mineral identification tips |
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| Robson Vieira Replies: 9 Views: 2863 |
Forum: Minerals and Mineralogy Posted: May 20, 2024 15:43 Subject: Re: Mineral identification tips |
| Whether it's necessary to learn about crystallography depends on how serious you are about adding to your identification skills and whether you care about the "whys" of many mineral properti ... | |
| Topic: Mineral identification tips |
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| Robson Vieira Replies: 9 Views: 2863 |
Forum: Minerals and Mineralogy Posted: May 20, 2024 15:37 Subject: Re: Mineral identification tips |
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I hope you don't have to cleave the specimen to identify it. One simple suggestion is to examine the prism faces. This area of euclase crystals is usually more striated, although this is only a hi ... |
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| Topic: Mineral identification tips |
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| Robson Vieira Replies: 9 Views: 2863 |
Forum: Minerals and Mineralogy Posted: May 20, 2024 15:32 Subject: Re: Mineral identification tips |
| Hey Josele. Yeah guy, i have token a look and it is complete and handy. Thank you. | |
| Topic: Mineral identification tips |
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| Robson Vieira Replies: 9 Views: 2863 |
Forum: Minerals and Mineralogy Posted: May 20, 2024 15:24 Subject: Re: Mineral identification tips |
| Hi guys. Im very glad your attention at all. It was more clear than i spected. Thanks a lot. | |
| Topic: Mineral identification tips |
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| Robson Vieira Replies: 9 Views: 2863 |
Forum: Minerals and Mineralogy Posted: May 16, 2024 16:40 Subject: Mineral identification tips |
| Hi everyone. Dueling about to distinguish a sample between topaz and euclase I have faced with the question of the cleavage of each one, and with the highly technical subject of Miller indices of clea ... | |
| Topic: Unknown metallic material |
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| Robson Vieira Replies: 3 Views: 4278 |
Forum: What is it? - Where is it from? Posted: Jul 20, 2020 20:20 Subject: Re: Unknown metallic material |
| Hi Bob interesting fact you stated. I had not thought of this possibility. It has clarified the question, even though my sample seems too dense to be silicon. I have minded if it could be an industry ... | |
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