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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 142 matches |
| Author | Message |
|---|---|
 Topic: what rock/mineral is this? (2) |
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| Bob Carnein Replies: 6 Views: 585 |
 Forum: What is it? - Where is it from? Posted: Aug 28, 2021 14:27 Subject: Re: what rock/mineral is this? (2) |
| This appears to be a specimen of baryte (cream colored) and vanadinite (dark rust-red colored) from Mibladen, Morocco. The little crystals on the back might be pyromorphite; they're a little blurry. | |
| Topic: Probable ruby/garnet mix? |
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| Bob Carnein Replies: 7 Views: 577 |
Forum: What is it? - Where is it from? Posted: Aug 27, 2021 09:56 Subject: Re: Probable ruby/garnet mix? |
| That's true, of course, and it illustrates why this kind of discussion isn't very useful without more information. | |
| Topic: Probable ruby/garnet mix? |
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| Bob Carnein Replies: 7 Views: 577 |
Forum: What is it? - Where is it from? Posted: Aug 26, 2021 15:07 Subject: Re: Probable ruby/garnet mix? |
| I agree with Joseph. Apparently, the garnet (?) is partly surrounded by light colored material that is fluorescing, and that could be microcline. | |
| Topic: Corundum Conundrum...is it ruby? |
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| Bob Carnein Replies: 3 Views: 543 |
Forum: What is it? - Where is it from? Posted: Aug 22, 2021 17:55 Subject: Re: Corundum Conundrum...is it ruby? |
| Can you give us any information about its hardness? Locality? Is the last photo just a strong light, or is it a LWUV (it looks like it might be a Convoy)? If not, does it fluoresce? | |
| Topic: 15 years since the beginning of FMF. As time goes! |
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| Bob Carnein Replies: 19 Views: 1681 |
Forum: Comments & Suggestions Posted: Aug 07, 2021 15:57 Subject: Re: 15 years since the beginning of FMF. As time goes! |
| Thanks for providing us all with an interesting and thought-provoking forum! | |
| Topic: Black, metallic, yellow oxide? |
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| Bob Carnein Replies: 23 Views: 1871 |
Forum: What is it? - Where is it from? Posted: Jul 23, 2021 18:40 Subject: Re: Black, metallic, yellow oxide? |
| This is a great find of a classic pseudomorph! Congratulations. | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jul 22, 2021 09:56 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| I was able to break this crystal into two fragments, preserving the termination. I sent the bottom half to John Attard, who completed an XRD analysis (attached), which indicates that it's quartz. No ... | |
| Topic: Black, metallic, yellow oxide? |
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| Bob Carnein Replies: 23 Views: 1871 |
Forum: What is it? - Where is it from? Posted: Jul 21, 2021 19:55 Subject: Re: Black, metallic, yellow oxide? |
| How about sphalerite? It should have a pale tan to brown streak and 6 directions of cleavage (seldom easily counted). The "other" mineral could be a break-down/alteration product of sphale ... | |
| Topic: 2021 Denver Show(s) |
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| Bob Carnein Replies: 3 Views: 976 |
Forum: Mineral Shows Posted: Jul 17, 2021 08:21 Subject: Re: 2021 Denver Show(s) |
| FYI, Larry Haven has speakers lined up to give talks Thursday, Friday, Saturday, and Sunday at the Denver show. At this point, there are 2 talks scheduled each day, from 10-11 and 11-12. So far, I b ... | |
| Topic: Identification Help |
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| Bob Carnein Replies: 2 Views: 453 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jul 14, 2021 20:12 Subject: Re: Identification Help |
| These look like quartz crystals coated by something. You need to read the General Guide for using the forum and do some basic tests (e.g. hardness, etc.). Otherwise, we can't really tell what it is ... | |
| Topic: Help identifying |
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| Bob Carnein Replies: 4 Views: 721 |
Forum: What is it? - Where is it from? Posted: Jul 02, 2021 20:13 Subject: Re: Help identifying |
| As you say, the photos are blurry. In the first one, it looks like the black, grainy surface beneath the flakes can be seen through a couple of them. Is this true, or is it simply a reflection? Are ... | |
| Topic: What rock matt black color high density medium hard ? |
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| Bob Carnein Replies: 11 Views: 1213 |
Forum: What is it? - Where is it from? Posted: Jun 23, 2021 08:25 Subject: Re: What rock matt black color high density medium hard ? |
| Unfortunately, the first step in identifying a smooth pebble or cobble is to break it. This gives you an idea of the texture, which can't readily be seen on the outside. Then, to identify most rocks ... | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 14, 2021 09:55 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| I tried scratching a very flat rhombohedron face on a "Herkimer diamond", and the unknown mineral left some powder and a VERY faint scratch. | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 14, 2021 09:46 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| I thought of barylite too, but specimens shown on Mindat have a pretty consistent "look" to them, and none look like this crystal. | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 13, 2021 20:43 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| Harder than steel. | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 13, 2021 18:20 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| I did try fluorescence, and there is none, in either SW or LW. However, I played around with the lighting, and there is a single fairly planar crack that appears to be perpendicular to the long axis ... | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 13, 2021 16:05 Subject: Re: Unknown mineral from Pikes Peak pegmatite |
| Thanks. I thought about danburite, but the striations still stump me. | |
| Topic: Unknown mineral from Pikes Peak pegmatite |
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| Bob Carnein Replies: 23 Views: 2802 |
Forum: What is it? - Where is it from? Posted: Jun 13, 2021 15:38 Subject: Unknown mineral from Pikes Peak pegmatite |
| A friend asked me to identify this crystal. He found it in a Pikes Peak pegmatite near Lake George, CO. The pegmatite has amazonite, smoky quartz, zircon, and abundant massive topaz surrounded by mi ... | |
| Topic: Collection of Shawn Spink |
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| Bob Carnein Replies: 15 Views: 1739 |
Forum: Collection photos and Collector's page Posted: May 13, 2021 18:15 Subject: Re: Collection of Shawn Spink |
| I'm always glad to help, as are most members of the forum. However, there are some basic tests you should conduct yourself before posting "unknowns". Otherwise, we waste a lot of time with ... | |
| Topic: Calcite form |
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| Bob Carnein Replies: 6 Views: 1388 |
Forum: Minerals and Mineralogy Posted: Apr 25, 2021 10:24 Subject: Re: Calcite form |
| Although I have no idea what the actual Miller indices are, I agree with your assignment of faces to those forms. | |
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