Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography
╳Discussions
💬 Home🔎 Search📅 LatestGroups
EducationOpen discussion area.Fakes & FraudsOpen discussion area.Field CollectingOpen discussion area.FossilsOpen discussion area.Gems and GemologyOpen discussion area.GeneralOpen discussion area.How to ContributeOpen discussion area.Identity HelpOpen discussion area.Improving Mindat.orgOpen discussion area.LocalitiesOpen discussion area.Lost and Stolen SpecimensOpen discussion area.MarketplaceOpen discussion area.MeteoritesOpen discussion area.Mindat ProductsOpen discussion area.Mineral ExchangesOpen discussion area.Mineral PhotographyOpen discussion area.Mineral ShowsOpen discussion area.Mineralogical ClassificationOpen discussion area.Mineralogy CourseOpen discussion area.MineralsOpen discussion area.Minerals and MuseumsOpen discussion area.PhotosOpen discussion area.Techniques for CollectorsOpen discussion area.The Rock H. Currier Digital LibraryOpen discussion area.UV MineralsOpen discussion area.Recent Images in Discussions
GeneralQuartz
14th Feb 2018 16:43 UTCDonald B Peck Expert
Don
14th Feb 2018 20:33 UTCRalph S Bottrill 🌟 Manager
14th Feb 2018 23:27 UTCScott Rider
http://www.quartzpage.de/index.html
15th Feb 2018 04:35 UTCKeith Compton 🌟 Manager
Amir explains so much about Quartz - easily understood and well illustrated, as is his website.
15th Feb 2018 09:02 UTCTimothy Greenland
Thank you Amir
Sincerely
Tim
16th Feb 2018 02:57 UTCEd Clopton 🌟 Expert
The wealth of general information about the species on the quartz page points up a weakness in other Mindat species pages. For all the numerical data and individual specimen info that Mindat so expertly makes available, most species pages include relatively little general text info to give the non-academic user a qualitative feel for the mineral the page represents.
For example, I especially like John Sinkankas's observation that datolite tends to occur in "glassy, faintly greenish, wedge-shaped crystals with odd-shaped faces seemingly placed at random" (Mineralogy for Amateurs, p. 547). Not rigorously quantitative, but in a few words it sure captures the character of datolite crystals! More info like that on species pages (vs. in individual photo captions that most users may never see) would help the more casual user like me who can't look at a table of unit cell parameters and Miller indices and say, "Wow, that would produce crystals with odd-shaped faces seemingly placed at random!"
We can't expect the volume of info presented on the quartz page for every last "whateverite" in the database, but a little more authoritative, qualitative commentary than most species pages presently include would be welcome. That would also be a good way to include curatorial information such as light sensitivity and thermal stability.
16th Feb 2018 12:39 UTCRalph S Bottrill 🌟 Manager
16th Feb 2018 14:45 UTCAlfred L. Ostrander
I do have a comment related more to what might be considered editorial consistency. Amir uses the modified Miller indices known correctly as the Miller-Bravais indices for trigonal/hexagonal mineral forms. Lower in the quartz page the crystallographic models use just the Miller indices. Many of us know what the difference is and how to move back and forth between the two. Many do not. Somewhere, there should be a note helping those who are not aware what is happening to help avoid confusion. It is my opinion that novices don't need anything added to the potential confusion of learning crystallography.
I have also noted that in many of the crystallographic projections for many minerals, only one or two forms are indexed and named while the model also shows other forms. If the form is present, I am of the opinion it should be named and properly indexed. More of a matter of incomplete work, perhaps.
And to be clear, Amir is not responsible for this inconsistency. Personally, I prefer the Miller-Bravais indices and am glad Amir used them. Still, it is important to be aware of the two types.
19th Feb 2018 01:02 UTCRolf Luetcke Expert
Had to add my comments too. Very, very nice and a great help with information on quartz. Loved what you helped with on the mindat quartz page.
I know I will use the page more with this wealth of information now.
Best to you
Rolf
20th Feb 2018 14:09 UTCPaul De Bondt Manager
We should have such a page on all the minerals with multiple form like calcite, fluorite, pyrite and many more.
20th Feb 2018 17:43 UTCJohn R. Montgomery 🌟 Expert
BTW... how does one access this page from the Mindat Home Page... ???
21st Feb 2018 15:39 UTCDonald B Peck Expert
22nd Feb 2018 01:41 UTCJohn R. Montgomery 🌟 Expert
John
22nd Feb 2018 02:51 UTCKeith Compton 🌟 Manager
The link certainly works. Just go to Scott's post and click on the link.
The whole of that site is by Emir.
Just a matter of working your way through it.
Cheers
22nd Feb 2018 12:02 UTCJohn R. Montgomery 🌟 Expert
ps I sent Scott a PM so hopefully he will tell me how he found that link
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 9, 2024 23:52:40
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 9, 2024 23:52:40