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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 33 matches |
| Author | Message |
|---|---|
 Topic: Pictures wanted |
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| RayStraw Replies: 3 Views: 1280 |
 Forum: Micros & Macros - Images of Minerals Posted: Jan 31, 2022 17:58 Subject: Pictures wanted |
| I recently purchased an azurite specimen partially replaced by malachite. The large crystal has malachite on the termination and one of the small crystals is broken showing botyroidal malachite on th ... | |
| Topic: Canon SLR with stacking |
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| RayStraw Replies: 14 Views: 2961 |
Forum: Off-Topic and Introductions Posted: Dec 05, 2021 13:37 Subject: Re: Cannon SLR with stacking |
| Two years ago I saw a demonstration of in camera focus stacking at the Rochester Mineral Symposium.
I bought the reasonable camera Olympus TG-4 and am pleased with the results. I plan to use the ... |
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| Topic: Malachite twinning |
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| RayStraw Replies: 5 Views: 12415 |
Forum: Minerals and Mineralogy Posted: Mar 08, 2020 06:50 Subject: Re: Malachite twinning |
| Thank you.
I bought and downloaded the paper. Ray |
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| Topic: Azurite to Malachite pseudomorph research |
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| RayStraw Replies: 14 Views: 20298 |
Forum: Forum questions Posted: Mar 06, 2020 10:23 Subject: Re: Azurite to Malachite pseudomorph research |
| This specimen from Roger Warin is just what I need for my azurite to malachite pseudomorph research (Malachite-psm-aurite_R.jpg):
Azurite crystal with chipped termination and malachite pseudomo ... |
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| Topic: Malachite twinning |
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| RayStraw Replies: 5 Views: 12415 |
Forum: Minerals and Mineralogy Posted: Mar 04, 2020 12:29 Subject: Malachite twinning |
| Someone claimed that all malachite is twinned.
Does anyone know of any discussion or papers to this effect? Best, Ray |
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| Topic: Azurite to Malachite pseudomorph research |
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| RayStraw Replies: 14 Views: 20298 |
Forum: Forum questions Posted: Feb 27, 2020 10:09 Subject: Re: Azurite to Malachite pseudomorph research |
| Roger:
This Tsumeb pseudomorph appears to be about 3cm maximum. Is that correct? Is it still in your collection? Best, Ray Straw |
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| Topic: Azurite to Malachite pseudomorph research |
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| RayStraw Replies: 14 Views: 20298 |
Forum: Forum questions Posted: Feb 27, 2020 10:05 Subject: Re: Azurite to Malachite pseudomorph research |
| Thanks everyone for your interpretations of azurite to malachite pseudomorphs.
All the information will be distilled and included in my paper. Best, Ray Straw |
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| Topic: Azurite to Malachite pseudomorph research |
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| RayStraw Replies: 14 Views: 20298 |
Forum: Forum questions Posted: Feb 25, 2020 11:10 Subject: Re: Azurite to Malachite pseudomorph research |
| Roger:
The partial pseudomorph would be ideal for my purposes which will involve cutting sections of the crystal. Please advise specimen dimensions. Thank you, Ray rsplinters(@)gmail do ... |
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| Topic: Azurite to Malachite pseudomorph research |
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| RayStraw Replies: 14 Views: 20298 |
Forum: Forum questions Posted: Feb 24, 2020 10:00 Subject: Azurite to Malachite pseudomorph research |
| I am still working on my paper which attempts to explain how malachite replaces azurite to form a pseudomorph where the azurite shape and faces are present but only malachite remains.
1. What I ne ... |
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| Topic: Researcher Identity |
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| RayStraw Replies: 2 Views: 7064 |
Forum: Off-Topic and Introductions Posted: Feb 19, 2020 18:21 Subject: Re: Researcher Identity |
| Sounds like Lawrence M. (Larry) Anovitz...he's at Oak Ridge National Laboratories
Thanks Peter. This is the correct person I'm looking for. Ray Straw |
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| Topic: Researcher Identity |
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| RayStraw Replies: 2 Views: 7064 |
Forum: Off-Topic and Introductions Posted: Feb 19, 2020 16:55 Subject: Researcher Identity |
| A friend at the recent Tucson show told me about a collector/researcher interested in buying pseudomorph crystals. I believe he planned to section the crystals to study the progress/mechanism of the ... | |
| Topic: Tucson Show 2020 |
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| RayStraw Replies: 104 Views: 106524 |
Forum: News about shows Posted: Jan 24, 2020 15:53 Subject: Re: Tucson Show 2020 |
| I have some ideas about using user posters to help fundraising for FMF or other mineral groups.
I'll be in Tucson from January 30 thru February 4. Could we meet if you are available with those d ... |
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| Topic: Color variation in azurite and malachite |
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| RayStraw Replies: 10 Views: 11078 |
Forum: Minerals and Mineralogy Posted: Nov 05, 2019 14:00 Subject: Re: Color variation in azurite and malachite |
| Alfredo:
Thank you for your insight. Ray Straw |
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| Topic: Color variation in azurite and malachite |
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| RayStraw Replies: 10 Views: 11078 |
Forum: Minerals and Mineralogy Posted: Nov 05, 2019 12:51 Subject: Re: Color variation in azurite and malachite |
| John:
Thanks for the summary of your work with Argentine rhodocrosite. I have just found a paper on optical behavior of commercial paint pigments--14. (Gueli, Anna, Bonfiglio, Guido, Pasquale, S ... |
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| Topic: Color variation in azurite and malachite |
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| RayStraw Replies: 10 Views: 11078 |
Forum: Minerals and Mineralogy Posted: Nov 03, 2019 09:29 Subject: Re: Color variation in azurite and malachite |
| Thanks for the beautiful Bisbee picture and the color difference explanation.
I do not want to compare azurite with malachite. For just malachite in the specimen I believe the shade represents t ... |
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| Topic: Color variation in azurite and malachite |
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| RayStraw Replies: 10 Views: 11078 |
Forum: Minerals and Mineralogy Posted: Nov 02, 2019 11:59 Subject: Re: Color variation in azurite and malachite |
| Thank you for the information. I can use the reference for other problems I have.
I was not clear in what I wanted. Botyroidal malachite often has different shades of green. Botyroidal azuri ... |
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| Topic: Color variation in azurite and malachite |
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| RayStraw Replies: 10 Views: 11078 |
Forum: Minerals and Mineralogy Posted: Nov 01, 2019 19:48 Subject: Color variation in azurite and malachite |
| Can anyone provide a reference to the cause(s) of color variation in layers of botyroidal azurite and malachite.
I think it is due to the size of the micro crystals. Thanks for the information ... |
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| Topic: Posters |
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| RayStraw Replies: 7 Views: 10362 |
Forum: Minerals and Mineralogy Posted: Aug 21, 2019 07:40 Subject: Re: Posters |
| Hi Ray,
feel free to save my collages from the FMF forum. I think this site scales the pictures down so if you want them in original resolution, you can give me your e-mail address. Regards Tob ... |
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| Topic: Posters |
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| RayStraw Replies: 7 Views: 10362 |
Forum: Minerals and Mineralogy Posted: Aug 20, 2019 14:32 Subject: Re: Posters |
| Thanks for the response.
Could you share one of collages? Say the one with Quartz. I'll get a copy of Microsoft Paint. Best regards, Ray Straw |
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| Topic: Posters |
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| RayStraw Replies: 7 Views: 10362 |
Forum: Minerals and Mineralogy Posted: Aug 20, 2019 09:52 Subject: Re: Posters |
| That is exactly what I was looking for.
Are you interested in sharing a template together with brief instructions? These would be a good way for FMF members to share collections or stories involvi ... |
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