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Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
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 Posted: Mon Sep 21, 2009 2:49 pm Post subject: Quartz crystals! |
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Acquired these this weekend, from a new source 
These are secondary (grown from another lab crystal, not a seed but a wafer) SiO2 (quartz) crystals.
These, I'm certain, are cut up for use in quartz oscillators.
They are quite large, and beautiful. Enjoy! |
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Windmiller
Joined: 24 Jun 2005
Posts: 1716
Location: Chapel Hill, NC
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| Posted: Mon Sep 21, 2009 3:03 pm Post subject: |
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| Cool, thanks for sharing!! |
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D.8080
Joined: 03 Apr 2006
Posts: 1474
Location: Italy
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| Posted: Mon Sep 21, 2009 3:05 pm Post subject: |
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Those are huge!
Mr. Jefferson must feel bewildered there  |
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JAC
Joined: 24 Jul 2005
Posts: 3469
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| Posted: Mon Sep 21, 2009 3:12 pm Post subject: |
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| Pretty sure those are grown artifically. |
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donutty
Joined: 16 Feb 2008
Posts: 1122
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| Posted: Mon Sep 21, 2009 5:04 pm Post subject: |
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| You sure that isn't a toy, little $20 ? They are gigantic! |
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Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
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| Posted: Mon Sep 21, 2009 6:19 pm Post subject: |
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Yes, they are atrificial (SiO2, not technically Quatrz) and are certainly grown around the clips which held the seed wafer in place
More pics to come, one of these beauts is going to Theodore Gray, the guy who owns the "Wooden Periodic Table table" elements collection! |
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johnorun
Joined: 04 Apr 2008
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Location: Chicago, IL- US
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Wizzard1
Joined: 05 Nov 2006
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Location: Boston MA USA
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Wizzard1
Joined: 05 Nov 2006
Posts: 930
Location: Boston MA USA
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| Posted: Tue Sep 22, 2009 8:29 am Post subject: |
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John, Quartz is Si02 but SiO2 is not always Quartz- Quartz being a natural mineral, these certainly being laboratory made
If I can get more (there's one more swapmeet this year, and I know the seller will be back again) I'll see what I can do. They sure are fantastic! |
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Wizzard1
Joined: 05 Nov 2006
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Location: Boston MA USA
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Fred Jodry
Joined: 14 Apr 2007
Posts: 107
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| Posted: Fri Apr 23, 2010 1:33 pm Post subject: Quartz crystals! |
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| Wanted here, quartz crystals for making oscillator crystals. They should be big enough to make one inch squares and thick enough to make oscillating elements of 2 MHz and lower in frequency. A friend has been looking for a 5.575 MHz crystal for years. |
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johnorun
Joined: 04 Apr 2008
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Location: Chicago, IL- US
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Sat Apr 24, 2010 1:44 pm Post subject: |
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Those are cool athough there is no big
difference to usual glass!
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Sat Apr 24, 2010 10:55 pm Post subject: |
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| doccybrown wrote: | Those are cool athough there is no big
difference to usual glass! |
Oh yes there is! 
These have a faceted surface similar to natural Quartz crystals, but the clarity is perfect and the color refraction is much more intense than glass, plus Quartz is harder than glass on the Moe scale of hardness.
I want one for coffee table decoration, if my wife doesn't object 
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My collection list (growing) http://johnorun.x86-guide.com/en/collection.html |
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doccybrown
Joined: 03 Oct 2005
Posts: 1736
Location: Germany
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| Posted: Sun Apr 25, 2010 4:49 am Post subject: |
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Alright, I want one quartz too!
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