Talk:Smoky quartz

References and External Links

Please see WP:CITE (Further reading/External links) for the proper use of External Links. Links used to footnote or verify an article's content are References. --VMS Mosaic 21:14, 10 April 2007 (UTC)

Absolutely true. But commercial links cannot be used. Links to mineral.galleries.com are considered spam and have be reported to Wikiproject Spam. There is no reason to use a commercial site when books and non-commercial sites are available. Jefferson Anderson 21:25, 10 April 2007 (UTC)

Merging

Talk about flip flop. I just ran into the paragraph in the text book I am reading and it appears they are the same. So I change my vote and say merge. The below statment still applies.

So how long does this 'discussion' go on before we merge or don't merge and remove the tag? --Xiahou 22:41, 19 July 2007 (UTC)

Just merge them & call it Smoky quartz because that's the term most people know. —Preceding unsigned comment added by 121.223.68.48 (talk) 09:00, 14 June 2008 (UTC)

Merged morion and cairngorm into smoky quartz as they are varieties of it. Vsmith (talk) 02:59, 21 October 2008 (UTC)

File:Quartz var. Smokey from Morella, Victoria.jpg to appear as POTD soon

Hello! This is a note to let the editors of this article know that File:Quartz var. Smokey from Morella, Victoria.jpg will be appearing as picture of the day on December 12, 2010. You can view and edit the POTD blurb at Template:POTD/2010-12-12. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! howcheng {chat} 17:32, 9 December 2010 (UTC)

Picture of the day

Smoky quartz is a brown to black variety of quartz. It goes by various names, depending on the colour: a dark-brown to black opaque variety is called "morion"; a yellow-brown variety from Scotland is known as "cairngorm", the colour being a result of ferric oxide impurity.Photo: Noodle snacks

People see the name "Smokey" with an "e" and so they commonly misuse it. It is not correct for quartz, campfires, or the Great Smoky Mountains, in spite of the fact it appears in the file name of this POTD picture. Martino3 (talk) 21:45, 23 November 2013 (UTC)

Irradiation ?

I am troubled by the lack of information as to the nature of the "irradiation" that causes quartz to become smoky. Microwaves? Laser? Ultra violet? Gamma rays? Neutrons? I am guessing ionizing radiation may be the case, but there really should be something about this in the article. Thanks. Wwheaton (talk) 05:36, 12 December 2010 (UTC)

Right, "irradiation" will not cause quartz to change color. Darkened minerals are almost universally caused by transition metal impurities (Fe, Co, Ni, Mn...). Here it is iron. To top it off, there is no reason that this type of quartz should be "aluminum containing" either. BaconEggonomics (talk) 07:36, 12 December 2010 (UTC)

"The color of smoky quartz is caused by irradiation and traces of aluminum built into its crystal lattice. Aluminum replaces silicon to form a [AlO[4]]^- group instead of [SiO[4]]. To compensate for the imbalance of charge in the lattice, small monovalent cations (H^+, Li^+ or Na^+) are built into the lattice, as well. High energy radiation transfers the extra electron from [AlO[4]]^- to the cation, and a color center is formed. Interestingly, H^+ seems to interfere with this process, and higher concentrations of built-in hydrogen inhibit the formation of color-centers^[1]. In normal geological environments this process can only take place at temperatures below 50�C, otherwise the rate of color center destruction surpasses that of color center formation. So the color of the crystals appeared long after the crystals have grown. It is estimated that it takes several million years for a crystal to assume a deep color in a granite of average composition." http://www.quartzpage.de/smoky.html This is the #1 article when you Google '"smoky quartz" formation'. Thanks for having this as the POTD, and since I don't feel like editing any articles today, I'll leave it up to someone else to make improvements. 24.27.25.87 (talk) 00:39, 13 December 2010 (UTC) Eric

Article says

The smoky colour results from free silicon formed from the silicon dioxide by natural irradiation

What is true? Ultima Thulean (talk) 15:17, 9 March 2021 (UTC)

External links modified (January 2018)

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Cairns, the mountains named cairn gorm, and

Cairngorm are smoky quartz Cairn if properly linked counts as a citation as the page links the definition and photos of what Cairns are--stacked rocks or the bluestones around stonehenge. Cairngorm are smoky quartz

This shows a link between Scottish artifacts and customs, the mountain range, and the terms used to describe stonehenge-- stacked stones — Preceding unsigned comment added by Oligodynamism (talk • contribs) 10:58, 24 November 2020 (UTC)

Mentioning the link on the page about smoky quartz to stonehenge tells the reader about the heritage of ancient britain Oligodynamism (talk) 11:00, 24 November 2020 (UTC)