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LAPIDARY ARTS and FACETERS DIGEST
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Issue No.66 - Friday February 14, 2003
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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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CLICK EITHER LINK BELOW TO POST:

lapidary@caprock-spur.com
faceters@caprock-spur.com

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From the Moderator:
The Website has been overhauled
to provide a better look and hopefully streamline use
of the site for young and old alike. A few sections
have been relocated to the website. They are:

Resources for Lapidarys, Faceters and Gemologist
Contest and Competitions
Show Dates
Personals

Classifieds will continue in both the digest and the website.

Links will be included in each digest to the content that
is moving.  This should reduce the "size" of the daily digest
to  conserve bandwidth. also look for a "New" look for
the Daily digest in the near future.

Thurmond

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Index to Today's Digest

01  RE: Opal Questions
02  RE: Opal Questions
03  RE: Opal Questions
04  RE: Spectrascope
05  RE: Spectrascope
06  Any  Faceters in Raleigh, North Carolina?
07  Missing Lapidary Person: Gerry Klein

BUSINESS SECTION:
08  RE: Arizona Mineral and Mining Museum

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Message:01

Subject: Re: About Opal
Date: Thu, 13 Feb 2003 17:41:58 -0600
To: faceters@caprock-spur.com
From: Thomas Whitlatch <whitlatcht@mchsi.com>


> mbegin ask:  A newbie question ?
 Does protecting and Opal by doublet or any other method that I do not know
decrease the value of the stone ?
Yes it will by about 2/3 of what you could get from an un capped piece.<

The best thing you can do is give it the very best polish that you can.  I finish of with
100,000 diamond.  And don't temperature shock it.

Tom
MWF State Dir. IA.
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Message:02

Subject: Re: opal
Date: Thu, 13 Feb 2003 16:01:50 -0800
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Noel Rowe <noel@roughtocut.com>

> From: mbegin@is.jgh.mcgill.ca
>
> A newbie question ?
>  Does protecting and Opal by doublet or any other method that I do not know
> decrease the value of the stone ?

Hi,

I don't know what name to call you by since you didn't sign your email.

Not quite sure if this will answer your question but I'll try anyway. A
solid opal of good quality will always be more valuable than an opal
doublet which in turn will be more valuable than a triplet. That is
assuming the quality of opal is comparable. A high quality triplet or
doublet often will be worth more than a low quality solid. Opals value
is based on quality of fire & carat weight of the opal. A doublets &
triplets provide a way of using precious opal which would otherwise be
to thin to be structurally sound( thus protecting the thin opal from
breaking). The black backing on a doublet or triplet can also enhance
the appearance of the fire, making what might otherwise be a rather dull
opal bright and colorful.

I hope this helps,

Noel
Rough To cut
http://www.roughtocut.com

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Message:03

Subject: opal doublets
Date: Thu, 13 Feb 2003 22:41:18 EST
To: faceters@caprock-spur.com
From: Tymib@aol.com

Mbegin wrote asking if making an opal into a doublet to protect it decreases
its value.
Doublets are not made to protect the opal ... a doublet is made because the
opal is too thin to be shaped, or to be durable.  Triplets are made using
very thin slices of opal. 
In the world of real cash value, both doublets and triplets are practically
worthless. In today's gem market they sell quite well ... in face, on ebay,
people are paying more for triplets than for solids!  When new, and looking
at the gem from top or some angle, they are extremely firey and outshine all
but the best of solid opals.  Doublets also seem to sell quite well on ebay,
also because it is possible to cut and polish even a fairly thin fire
layer... though doublets really have a BASE put on them for stability, and
the top is really quite natural opal. Anything with a cap is considered a
triplet in reality.
BUT, to me, this is pretty gross decete.  People who pay well for triplets
simply do not know what they are doing.  In the first place there is almost
no material of value in the gem ... more importantly the gem is almost
certain to cloud up or disintegrate in time.  The glue is there, it will be
affected by water, by heat, simply by age.  The top is worthless.. If you
look at the gem from the side, you see ... well, you see clear glass or
quartz. There is no intrinsic value.
Doublets are a bit better deal i think and i often make them.  But i am
careful to emphasize to customers that they ARE doublets and are NOT as
intrinsically valuable as solid opals. The bottom can also separate from a
doublet, but the appearance is not altered and it can be re-glued, as long as
the opal has not cracked.
I need to shut up soon, but you are in my field and i don't often get to rave
on here about something i am expert on :)  So, a final word. There seem to be
less and less of us who deal quality opal.  That is because it is getting
very hard to get quality opal.  There have been no new fields found in
Australia for some time.  The existing miners are going quite deep to get the
rough.  This is not good because, contrary to popular opinion it is NOT good
for opal to sit in the damp... it makes the rough much more likely to crack
in 6 months to a year, if it is not already cracked.  I now store ALL my
rough at least 6 months before putting it on the  site or offering it to my
dealers/cutters.  Of the decent rough commonly available (as on ebay) most of
it is fairly thin (often shell rough) and simply requires a backing to be
used.  There is nothing wrong with that - just be upfront about it and
realize that it is not as intrinsically valuable as a solid.
phew ... i shall shut-up for at least a month you all!  bill b

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Message:04


Subject: Spectroscopes (was-Re: Issue No.61 - Friday February 7, 2003)
Date: Thu, 13 Feb 2003 17:41:35 -0600
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Downey <alckytxn@swbell.net>

> Hi, everyone!
>
>     I am looking for information on spectroscopes, the diffraction and prism
> type...whats the advantages/disadvantages to each type?  Also I am looking
> for a book or web site that would have the diffraction charts for some
> gemstones.
>
>
> THANK YOU ALL.....
>
> Steve

Howdy Steve,

In addition to the other sites listed at the end of the digest I can
highly recommend the International Gem Society (IGS). web site is:
http://www.gemsociety.org and , though perhaps not available for long,
the www.yourgemologist.com website.
Liddicoat and others have gemstone ID books available with most of the
standard spectra. I recently picked up the Anderson and Payne book and
it is extensive (fun reading the history of spectrscopy).
You'll enjoy investigating this somewhat overlooked key to stone ID. I
am trying to educate myself in gemology too but the s'scope I bought on
ebay seems better suited to lab work with chemicals. I still may be able
to adapt it for stone ID but it will never be truly portable.
Have fun!
Carl
1 Lucky Texan

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Message:05

Subject: Re: Issue No.65 - Thursday February 13, 2003 Message:05
Date: Fri, 14 Feb 2003 00:34:21 -0500
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Kreigh Tomaszewski <Kreigh@Tomaszewski.net>

Steve,

You ask a broad question. Are you looking to capture a transmission
spectra, or an emission spectra? Diffraction gratings can be reflective
or transmission. The key is understanding how the spectascope
fundamentally works -- and some good craftsmanship.

It may be hard to find (try your local library -- interlibrary loan),
but "Amateur Telescope Making", a three volume set edited by Albert
Ingalls, and published by Scientific American, may be your most
practical source of information on how to build a spectrascope (of any
type).

Spectra data can be found online or at your local library.

Kreigh
__________________________________________________________
Message:06

Subject: Anybody in Raleigh, North Carolina?
Date: Thu, 13 Feb 2003 22:34:06 -0800
To: <faceters@caprock-spur.com>
From: "Jill St. Michael" <jsdp@san.rr.com>

Hi All,

We have a faceter-friend in Raleigh, North Carolina who would love to have
some local faceting companionship. If there are any kind-spirited members in
that part of the country, who are willing to help, please email me directly
(jsdp@san.rr.com) and I will provide her contact information.

Thanks much,
Jill St. Michael

__________________________________________________________
Message:07

Subject: Gerry Klein
Date: Fri, 14 Feb 2003 15:19:39 -0800 (PST)
To: LAPIDARY ARTS & FACETERS DIGEST <faceters@caprock-spur.com>
From: Glenn Klein <glennklein@yahoo.com>

Hi All:

I am making a second request for help in getting in touch
with Gerry Klein who has been living in the Seattle area.
Does anyone know if he is ill, or has moved, etc.  Please
send me any information you may have about him.  I need to
relay some information to him about the Faceters Symposium
2003 coming up at Ventura next June. 

Thanks for any help, fellow faceters.

Glenn Klein, Chairman
Faceters Symposium 2003

glennklein@yahoo.com

__________________________________________________________
BUSINESS SECTION:

Message:08

Subject: Re: Issue No.65 - Thursday February 13, 2003 (Business Section)
Date: Thu, 13 Feb 2003 14:06:00 -0800
To: "LapidaryArtsDigest" <lapidary@caprock-spur.com>
From: "Gail Bumala" <boomart@cascadeaccess.com>

John McLaughlin stated: 

>I sincerely urge you to stop this misguided attempt to save a very small
amount of annually budgeted money and to generate a one time piece of
revenue by selling the old Shriner's hall, which houses the Museum.  I
frankly do not believe the State would be able to sell the mineral
collection after the media finished interviewing the donating clubs'
officers and the surviving family members of the collection's individual
donors.

Yours truly,

John McLaughlin
6102 W. Altadena Avenue, Glendale, Arizona, 85304
(623) 979-5246   jemstone@amug.org
Member, Mineralogical Society of Arizona, Arizona Leaverites Rock and Gem Club,
Arizona Mineral and Mining Museum Foundation<




John,
Here-here! And well said. 

Gail Bumala, Sandy, Oregon, USA 
boomart@cascadeaccess.com

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TODAY'S FUNNY ~

Death is Nature's way of saying 'slow down'.

Don't force it, get a larger hammer. 

Fairy tales: horror stories for children to get them used to reality.

Going the speed of light is bad for your age.

Health is merely the slowest possible rate at which one can die.

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REFLECTIONS AND TIDBITS:

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And it will plague you like the devil."

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CLASSIFIED ADVERTISEMENTS:

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Subject: Subject add
Date: Thu, 6 Feb 2003 15:47:26 -0500
To: <faceters@caprock-spur.com>
From: "RICHARD P ROSENTHAL" <kenaii@earthlink.net>

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