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LAPIDARY ARTS and FACETERS DIGEST
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Issue No. 107 - Monday April 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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POST TO EITHER LINK BELOW:
lapidary@caprock-spur.com
faceters@caprock-spur.com
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VISIT OUR WEBSITE TODAY
http://www.gemcutters.org
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From the Moderator: 

Topical Focus for This Week: AMBER AND COPAL CUTTING

My Subscriber submitted topic list is empty.
Send in some new Topics
to owner-lapidary@caprock-spur.com  

Thurmond
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Index to Today's Digest

01  RE:  Cold Dopping induced stress
02  RE:  amber/copal cutting clinic topic
03  RE:  Thanks, Opals and Opal Addiction
04  NEW:  Bob Keller's "Rockhounds.com" site
05  NEW:  raytracing
06  NEWS: Walter Carrs
07  NEW:  Emerald Sources?
08  NEW:  Off The Dop.

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Message:01

Subject: Cold Dopping induced stress
Date: Sat, 12 Apr 2003 20:37:54 -0400
To: LapidaryArtsDigest <lapidary@caprock-spur.com>, Douglas Turet
<anotherbrightidea@hotmail.com>
From: Kenda Wright <kendaw@worldnet.att.net>

> Subject: Re: Issue No. 104 - Wednesday April 9, 2003
> Date: Fri, 11 Apr 2003 02:03:05 -0400
> To: faceters@caprock-spur.com, dclayton@speakeasy.org, covill@msn.com
> From: "Douglas Turet" <anotherbrightidea@hotmail.com>

>  I've always preferred wax's elasticity to either of them.

Doug,
So, I understand stress induced by epoxy as it shrinks.  That makes sense.
I watched a beautiful green tourmaline crystal crack as I cut. So, I believe
everything you said.

What is your method to use wax on both sides without overheating the
stone while keeping the temperature high enough to make good
bond on side two?

I could never perfect the wax-to-wax technique so, my normal
method is brown wax on side one, cut pavilion. Transfer with epoxy,
cut crown. Remove side one brown wax by heating the dop
over a flame to release the wax.  Same to releas epoxy bond on side two.
Then clean up with denatured alcohol.   This seems to work well,
except with heat sensitive stones.

I split a beautiful yellow appatite initially dopping with brown wax because
the wax was too hot for the stone.  So, heat seems to be a
stress inducer for some heat sensitive stones (apatite).  And, epoxy induces
stress in tourmaline.   So, I guess I shoudl pay attention to more techniques
for how to bond and release tourmaline to the dops.

John, in Lexington

__________________________________________________________
Message:02

Subject: Re: Amber, Copal, Pearl.
Date: Sun, 13 Apr 2003 11:41:27 -0700
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Tony <lightbender@thegemdoctor.com>

Hello Thurmond,

Amber presents few problems for cutting but polishing is another
matter. The old standbys will smear and tear any facet, very
very wet leather (yikes) will give about a good a polish as
amber takes and round off your facet edges completely. Dopping
can also be a problem as dop wax will affect the polish as will
alcohol used as a cleaner. To get around this problem you will
have to resort to a bizarre cutting order. Cut and polish crown,
dop to cut table, cut and polish pavilion, hand held to polish
table. Most glues will eat amber so they shouldn't be
considered, Acetone dissolves amber rapidly. A surprisingly good
polish can be achieved by rubbing the stone against denim cloth
vigorously, but this would be for cabbed stones.

I have a small amber collection, none of which are faceted but
all of my pieces have spider or insect inclusions. I have
repaired and repolished many pieces of amber over the years and
have never seen any that looked attractive faceted, beads are
the closest.

I can't imagine why anyone would want to do anything with copal
resin, this stuff will crumble whilst being cut and is a pain to
polish even by amber standards. Even with bug inclusions it has
only minimal value so you need to have something special trapped
inside for it to be worth bothering with.

Hello Naomi,
Pearl faceting has become popular recently and is certainly a
saver for a pearl that is damaged, wrinkly, or otherwise
unsellable. The important factor is the depth of nacre, if you
cut through it you get a dead spot or even worse you find the
seed. This means facets are going to be small. Obviously this
limitation will prevent much creativity. Polishing is no real
problem with cerium on plastic.

 I would only recommend faceting for pearls that will not sell as
there is very little if any value to be gained by cutting one in
this fashion. If you must try this I would suggest you practice
with a piece of abalone shell or M.O.P. to get a feel for how to
work this material. A low dome checkerboard rose cut in abalone
shell can be quite dramatic.

Tony.


__________________________________________________________
Message:03

Subject: Thanks
Date: Sat, 12 Apr 2003 12:30:17 +0100
To: "LapidaryArtsDigest" <faceters@caprock-spur.com>
From: "Gustavo Castelblanco" <mail@montana78.freeserve.co.uk>

Hi,

I wanted to thank all the people who shared their knowledge about opals
on and off the list.
After reading very carefully and taking notice about the advise and
information given to me about the Enchanted Opal I have come to the
conclusion that the stone will be better cut into a cab. I will loose
too much weight otherwise and may not have a good result if I facet it.

I am getting very interested in opals. I have never really look at the
parcel I bough till I saw Phil's stones. I hope I don't become an opal
maniac as it will take me away from faceting. Maybe I should find the
happy medium line between both. Still I have to learn to cab and it will
be a while before I tackle any decent stone.

Regards,

Gustavo.

__________________________________________________________
Message:04

Subject: Bob Keller's "Rockhounds.com" site
Date: Sat, 12 Apr 2003 14:58:13 -0400
To: faceters@caprock-spur.com
From: "Douglas Turet" <anotherbrightidea@hotmail.com>

Hi everyone,

     For about the past week, or so, I've been trying to access Bob Keller's
"Bob's Rock Shop" URL (see subject line), but it's been inaccessible through
both the msn.com and Yahoo! portals. Can anyone  suggest either a viable
point of access to the site, or provide me with access to another tangent
ratio calculator, so that I can adjust some designs for low-R.I. materials?
My recent design requests have turned up some interesting options, but I
can't ttry them without making adjustments, first. (Oh, and to those who
might be tempted to send the actual, specific formulae for angle
adjustments, please don't: I'm quite mathematically challenged, and won't
know how to make use of them. What I'm seeking is the kind of setup Bob had
on his site, where you plug in the original series of angles, then tell the
"calculator" which angle the "goal" setting should be at, and press "Go",
and it prints out the rest. Does anyone else have something like this
available? If so, please write or phone me with the details.

Many thanks, indeed,
Doug

Douglas Turet, GJ
Lapidary Artist, Designer & Goldsmith.
Turet Design
P. O. Box 162
Arlington, MA 02476, U.S.A.
Tel. (617) 325-5328
Fax: (928) 222-0815
Email: anotherbrightidea@hotmail.com

__________________________________________________________
Message:05

Subject: raytracing
Date: Sun, 13 Apr 2003 00:21:10 -0500
To: IFA Faceter's Digest <faceters@caprock-spur.com>
From: Downey <alckytxn@swbell.net>

Howdy Folks,

While doing a little research into an optics experiment I'm playing
around with, I came across the article at
http://www.gia.org/wd_1383ar_2282.htm   .
So, does anyone know if GemCad or other raytracing programs take
polarization states into account when calculating paths and brightness?

Carl
1 Lucky Texan


__________________________________________________________
Message:06

Subject: Walter Carrs
Date: Sun, 13 Apr 2003 12:02:56 -0700 (PDT)
To: LAPIDARY ARTS & FACETERS DIGEST <faceters@caprock-spur.com>
From: Glenn Klein <glennklein@yahoo.com>

Hi Everyone: Rhoda and I just got a call from Beryl Carrs, with the news that
Walter Carrs passed away this morning. Walter was one of our best United
States competition faceters.  He was a great supporter of the United States
team and will be greatly missed by us other competition faceters. Walter was
also one of our United States Air Force hero's of World War II, where as a
Colonel he participated in the infamous Ploesti raid over Romania, and he
later crashed landed his B-24 on another mission over Italy....after having
his other crew members all bail out first. We have lost a great American.
Glenn Klein
__________________________________________________________
Message:07

Subject: Re: Issue No. 105 - Thursday April 10, 2003
Date: Sun, 13 Apr 2003 23:11:22 -0600
To: <lapidary@caprock-spur.com>
From: "George Mather" <Concordml@msn.com>

One more question please, where do you get your emeralds?
Thanks.

__________________________________________________________
Message:08

Subject: Off The Dop.
Date: Mon, 14 Apr 2003 18:48:54 +0100
To: "LapidaryArtsDigest" <faceters@caprock-spur.com>
From: "Gustavo Castelblanco" <mail@montana78.freeserve.co.uk>

Hi,
I finished cutting a Bytownite yesterday and wanted to show it to you
all. I use one of my designs called Cobra. the stone is a soft straw
yellow and the picked up all the surrounding colour in the photograph. I
do like the pattern of this design as it's a little different than other
squares. To view the stone go to http://mysite.freeserve.com/gemstones/
and look in the "Latest Cut Stone" page.
Regards,
Gustavo.

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Post something from your experiences in gemcutting today!
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TODAY'S FUNNY ~

A blonde was recently fired from an M&M factory for throwing
away Ws and peeling the shells on the candies. Therefore,
she needed a new job to support herself. After going around
town asking if anyone needed work done, she found a man
who needed a painter.

"I'm here for the paint job," she said.

"Alright," said the man. "Here is the paint and your brush.
I want you to paint my porch behind the house."

The blonde immediately went to work painting. Within an
hour, she was done and decided to put on a second coating.

After she finished, she returned to the man for her pay. She
said with satisfaction, "I not only completed the job, but I even
put on two coats of paint! By the way, that isn't a porsche out
back. It's a new BMW.

=====================================

REFLECTIONS AND TIDBITS:

Everyone needs to be loved . . . especially when they do not deserve it.

--Author Unknown--

=====================================

CLASSIFIED ADVERTISEMENTS:


We recently received a 100+kg parcel of the Serbian Green Opal. This is a
new material coming out of southern Serbia near the border of Macedonia. It
is an awesome material for cabbing as we well as excellent material for
carving.

We are putting some individual pieces on our website at:

       http://www.unconventionallapidarist.com/rough/cabbing/greenopal/

Information about Serbian Green Opal can be found on our website at:

      http://www.unconventionallapidarist.com/gems/greenopal.html


A example picture of the bulk rough can be seen on the information page
(above link).

But, we are offering bulk prices on 'A' grade material as follows:

< 500 gram        $.75 per gram
500 gram - 1kg    $.50 per gram
1kg - 5kg         $275  per kg
5kg - $25kg       $200  per kg
25kg+             $175   per kg

The minimum order on the bulk pricing is 100 grams.
Pieces range from 3/4" to 6".

Thanks,

Unconventional Lapidarist
James Carpenter
Phone: 940.727.1536
Email: info@unconventionallapidarist.com
Web:   http://www.unconventionallapidarist.com

04112003
*******


Incredible CZ rough available in all colors of the rainbow.  Most available
at 6 cents per ct.  Pic's available at www.pebbledesignbymolly.com   Click on
the CZ button from the home page.  We accept paypal, checks, MO, Visa, MC. 
$25 order minimum.

Mike Scanlan
Pebble Designs
PO Box 1014
Hixson TN  37343
USA
www.pebbledesignsbymolly.com

04082003
*******


Killer Fire Agate, from new Discovery , Deer Creek, Slaughter Mt.
quality at reasonable price. Write Azinterco@aol,com   for pictures and
prices. Or kenaii@earthlink.net


04072003
*******


Get a FREE copy of the 2003 Faceter's Engagement Calendar
with a $100+ rough purchase at http://www.qualitygemrough.com
(see website for details).

We have recently added some new material, including a new African
find of green/yellow diopside (and we are the only people we know
who have it).  Our stock includes things like alexandrite, amethyst,
aquamarine, chrysoberyl, citrine, emerald, garnets (many varieties)
kornerupine, sapphire, spinel, tourmaline, zircon and more.

At http://www.qualitygemrough.com you get more value for your
money and we show our appreciation for your business with superior
customer service.  You always have a money back guarantee with
the 5-day inspection period, and the convenience of using your
Visa or Mastercard.

03042003P
*******



Rough to Cut
If you're looking for quality facet rough please check out Rough to Cut,
http://www.roughtocut.com. We offer a wide range of quality facet rough
from Aquamarine to Zircon. Large selections in stock currently of Beryl,
Garnets & Tourmalines. Please check us out & when you do, why not give a
try to our contest, you could win a 5ct + piece of Spessartite garnet
facet rough.

Noel
Rough to Cut
http:www.roughtocut.com

11142002P
********


AVAILABLE FOR SALE
Contact b-daw@pacbell.net

Honey, red & brown zircons, 10g parcels @$20/parcel
Red Garnet $8/g, eye clean-slightly included
Spessartine Garnet $7.50/g, slight-moderately included
Malaya Garnet $6/g, good eye clean roughs
Tunduri Garnet $10/g, eye clean-slightly included
Pink Tourmaline $20/g, eye clean-slightly included
Red Tourmaline $10/g, slight-moderately included
Bicolor Tourmaline $15/g, eye clean
Watermelon Tourmaline $20/g eye clean
Green/Green Blue Tourmaline $10/g, eye clean roughs
Blue, Green & Blue/Green Sapphires $35/g, eye clean-slightly included, up to 1g.
Blue Beryl (Aquamarine) $6/g, eye clean-slightly included crystals
Green Beryl (Emerald) $10-$50/g, eye clean-slightly included crystals, zoned green
Cabbing Grade Aquamarine $3/g

11012002P
********

Rock Peddler
Complete online discount catalog for cabbing and faceting machines, wheels,
laps, polishes, diamond saws, diamond blades, and general lapidary supplies
at http://www.rockpeddler.com.

09272002P
********

Gewelers Gems
e-mail: sales@jewelersgems.com
Solid copper laps 1/4 thick 8" and 6"  you can charge both sides with
diamond. Other laps too !! http://www.jewelersgems.com
03222002P
********

NOW ONLINE!  RRGaetan Gem Rough - Featuring excellent, facet-grade,
Colombian Emerald rough! PLUS, Chrome Tourmaline, Achroite Tourmaline,
Golden Chrome Tourmaline, Aquamarine, Spess, Mint and Malaya Garnets,
and more! For photos and more information, visit us at rrgaetan.com .

01012003RP
********

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