|
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.
|
| Search found 29 matches |
| Author | Message |
|---|---|
 Topic: Help - which acid dissolves quartz? |
|
| Gordian Replies: 17 Views: 41820 |
 Forum: Conserving, Preparing and Cleaning Minerals Posted: Jun 30, 2011 09:43 Subject: Re: Help - which acid dissolves quartz? |
| The only acid that I know of that might do the trick, because it does work on glass is hydrofluoric acid, which is really a very nasty chemical. It is very corrosive to the skin and the fumes are very ... | |
| Topic: The irradiation issue |
|
| Gordian Replies: 17 Views: 17056 |
Forum: Minerals and Mineralogy Posted: Sep 01, 2010 20:20 Subject: Re: The irradiation issue |
| Just for sake of argument, have we become the alchemist of the past, where we bump an electron here and there, and make what we want? Push a "who" and make gold? Is this really possible? I ... | |
| Topic: The irradiation issue |
|
| Gordian Replies: 17 Views: 17056 |
Forum: Minerals and Mineralogy Posted: Sep 01, 2010 18:42 Subject: Re: The irradiation issue |
| With Gamma ray irradiation there is no change in the types of nuclei that make up the mineral's chemical nature. Gamma rays interact with the electrons, mostly the outer electrons of atoms and dependi ... | |
| Topic: The irradiation issue |
|
| Gordian Replies: 17 Views: 17056 |
Forum: Minerals and Mineralogy Posted: Aug 30, 2010 09:02 Subject: Re: The irradiation issue |
| It really depends on the type of radiation. If it is high energy gamma rays, which changes the color centers in the material then there won't be any residual. If someone is dumb enough to put the mine ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Aug 13, 2010 11:17 Subject: Re: Gordian's Collection |
| Thank you Debbie. One has to love a nice Fluorite!
c.rhodes |
|
| Topic: Bob's rocks |
|
| Gordian Replies: 348 Views: 511921 |
Forum: Collection photos and Collector's page Posted: Jul 29, 2010 13:24 Subject: Re: Bob's rocks |
| Very nice example of Pyromorphite. I love the lead (Pb) minerals.
c.rhodes |
|
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jul 29, 2010 13:06 Subject: Re: Gordian's Collection |
| Some new additions to my collection. | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jul 15, 2010 18:46 Subject: Re: Gordian's Collection |
| For me the following specimen of Jamesonite is fascinating. The acicular/hairy minerals have always interested me, which is probably why I tend collect so many. This specimen is from Noche Buena, Zaca ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jul 14, 2010 08:39 Subject: Re: Gordian's Collection |
| A small, 18x13x10 mm, Azurite-Malachite specimen from Kerrouchene Morocco. The Azurite crystal is 18x4x5 mm in size on a splay of Malachite. | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jul 09, 2010 19:20 Subject: Re: Gordian's Collection |
| Here is a wonderful specimen of Sphalerite, with Calcite and Aragonite, and as I discovered while studying the Sphalerite matrix a couple tiny clusters of what looks to be pyrite. The pyrite clusters ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jul 06, 2010 11:46 Subject: Re: Gordian's Collection |
| Here is a nice Wulfenite with Mimetite, ex Dawn and Jim Minette collection. Cluster of Mimetite covered Wulfenite crystals on a larger (4.1x3.6 cm) crystal. The Mimetite balls are ~1-3mm in size. The ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 29, 2010 09:03 Subject: Re: Gordian's Collection |
| No, it's not some false color image of the surface of some distant world, it is an interesting sample of Chalcanthite, on some brittle matrix and scattered about (having difficulty photographing prope ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 28, 2010 08:57 Subject: Re: Gordian's Collection |
| A small specimen of Hausmannite, with Baryte and a cluster of Garnets. Pyramids to 1cm. Overall size 3x1.5x1.5 cm.
N'Chwaning I Mine, Kuruman, Kalahari manganese fields, Northern Cape Province, ... |
|
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 27, 2010 10:09 Subject: Re: Gordian's Collection |
| There is nothing particularly special about this piece of Rhodochrosite from China, except that for the beautiful pink color that caught my eye. I never found any of the pyrite that the seller indicat ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 25, 2010 10:01 Subject: Re: Gordian's Collection |
| Actually, I am not always sure what Stilbite looks like in all cases - I know it most of the time when associated with Cavansite - but not always. This is exactly the reason why I am on this list and ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 25, 2010 09:23 Subject: Re: Gordian's Collection |
| We'll take a short break from the Wulfenite as I struggle to get a good photo of another specimen, to share a small (thumbnail) specimen of Vanadinite from the Old Yuma Mine, Pima Co., Arizona.
Th ... |
|
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 25, 2010 09:12 Subject: Re: Gordian's Collection |
| Here is another nice specimen of Wulfenite from teh North Geronimo Mine, La Paz, Co., Arizona. A nice blade of red-orange Wulfenite on colorless Calcite, ~7mm across, with two slight dings (too bad, b ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 25, 2010 08:35 Subject: Re: Gordian's Collection |
| Wulfenite is another favorite mineral of mine - and living in the US Southwest it is a common mineral to find as there are so many lead and Moly mines around. The following specimen is from the Rowley ... | |
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 24, 2010 08:34 Subject: Re: Gordian's Collection |
| Chalcotrichite form of Cuprite. A nice "hairy" mineral! 6.5x3x3 cm specimen, Bagdad, Yavapai Co. Arizona.
Charley |
|
| Topic: Gordian's Collection |
|
| Gordian Replies: 28 Views: 47837 |
Forum: Collection photos and Collector's page Posted: Jun 24, 2010 08:30 Subject: Re: Gordian's Collection |
| This thumbnail specimen if from a location near Melrose, in Iowa. Tiny Goethite crystals on a bed of Calcite, with a Quartz crystal as a back drop. The specimen is 3.5x2.5x2. cm in size. The longest c ... | |
All times are GMT - 5 Hours |
FAQ 
Register
Log in
Forgotten your password?
