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LAPIDARY ARTS and FACETERS DIGEST
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Issue No. 293 - Friday, July 16, 2004
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Moderated by: Thurmond Moore III
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Committed to carrying on the fine works of
Hale Sweeny and Jerry Dewbre
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POST TO EITHER LINK BELOW:
lapidary@caprock-spur.com
faceters@caprock-spur.com
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Hi all,

Here it is. One word describes it--

SHORT!!!

Have a great weekend.

Thurmond

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Index to Today's Digest

01  RE: Buyer Beware
02  RE: spectrascope
03  NEW: Midwest Faceters Guild 15th Annual Seminar


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Message:01

Subject: Re: Issue No. 292 - Friday, July 09, 2004
Date: Fri, 9 Jul 2004 17:09:35 EDT
To: lapidary@caprock-spur.com
From: Lapadary@aol.com


In a message dated 7/9/04 12:02:46 PM Pacific Daylight Time, 
lapidary@caprock-spur.com writes:


After some soul searching, I  decided that this was worth passing
along to you.


A few years ago I had the same feeling about "white buffalo turquoise." It  
was being sold on Ebay with a certificate of authenticity from the Nevada
Bureau  of Mines. I contacted the seller and got an email back (from Stone   Roses)
saying it had been tested and was real turquoise without  any copper in it. I
contacted the Bureau of Mines in Reno and found  out the sample they had
tested contained trace amounts of turquoise -- but  it was not white turquoise. I
posted that information and the email I  had got from the seller on Bob's
Rockshop.
 
The seller emailed me and said by posting his email without permission I  had
violated the Terms of Service on Ebay, AOL, and Bob's Rockshop. He CCed me 
the complaints he filed with Ebay, AOL, and Bob Keller. I never heard anything 
further from anybody and I know Bob would not be shy if my actions offended
him.  I haven't seen any white turquoise for sell lately either.
 
If we want to be respected we have to police ourselves. Keep on reporting 
things that need to be reported
 
Grant Johnston, Chico, CA

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Message:02

Subject: Re: Issue No. 292 - Friday, July 09, 2004
Date: Fri, 09 Jul 2004 22:23:19 -0400
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Kreigh Tomaszewski <Kreigh@Tomaszewski.net>

LapidaryArtsDigest wrote:
> Message:01
>
> Subject: spectroscope ????
> Date: Mon, 28 Jun 2004 23:49:36 -0400 (GMT-04:00)
> To: lapidary@caprock-spur.com
> From: Michael & Linda <lakeout@earthlink.net>
>
> I have been toying with the idea of using a Web cam and attaching a
> spectroscope to the end so I can take take a picture of the spectrum.
> Has anybody on the list done anything like this? I am thinking of
> building a box that is painted black inside and using it to focus on a
> bright beam of the light shining through the gem/rough. I'll start in the
> morning and see how it goes.

You are going to be challenged by lack of light. A spectascope focuses a
light on a slit -- and the thinner the better. What little that gets
thru is then dispersed by a diffraction grating or prism and projected
onto a screen (film in the classic form) so you and your camera can view
it by reflection. Your remarkable eye has no problem seeing even a faint
spectra, but web/digital cameras (and film cameras) often have problems.
If you try to look at the spectra directly (from the screen's
perspective) you will only be able to see a few lines at most because
your vision or camera lens is too narrow.

You will need a very bright light, or be forced to accept reduced
resolution from opening the slit, to get enough light for the image
projected on the screen to show up on something besides your eye. I've
had pretty good luck using sunlight, or a carbon arc lamp, on the last
couple spectascopes I've thrown together for specific projects using my
table saw as an optical bench. I look forward to hearing how your
project came out (and hopefully with a URL for pictures).

Kreigh

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Message:03

Subject: Midwest Faceters Guild 15th Annual Seminar
Date: Sat, 10 Jul 2004 05:05:50 +0000
To: faceters@caprock-spur.com
From: tmiller277@comcast.net

Faceting Seminar Midwest Faceters Guild
The Midwest Faceters Guild 15th Annual Seminar will be conducted at Mott Community
College, in Flint, Michigan,  August 20-22, 2004.  Our classes offered in faceting
are Beginners, Level one, Level two, Level three, Advanced and Open. Other classes
offered are GemCad for Windows, Chain making and Beeding. Our Guest Speaker for our
Banquet on Sat. evening will be Jim Perkins, Jim's Topic is "Unique Faceting". For
more information Call Tyler Miller (810)655-6530 or    
E-mail  tmiller277@comcast.net

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If you receive a newspaper with an article in it headlined "Budweiser Frog Dies", DO
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Apparently it is a new sort of virus; the "Newspaper Virus". When this article is
read, it will cause the printed characters on the newspaper to 'crash' , that is,
come unglued, and fall in a big heap in your lap. This particular virus is very
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causing THEIR print to become unusable.

As well, any computer screen viewed with infected eyes will have all pixels on it
fall in a pile onto the keyboard, rendering it inoperative. The New York Times this
morning confirmed the existence of this virus. Microsoft and Reuters are now
investigating it.

THIS VIRUS IS EXTREMELY DANGEROUS. THE UNITED STATES OPTICAL SOCIETY HAS ADVISED ALL
READERS TO WEAR COBALT-SAMARIUM TINTED GLASSES BEFORE READING A NEWSPAPER.

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---Leighton---

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