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LAPIDARY ARTS and FACETERS DIGEST
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Issue No.78 - Tuesday March 04, 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:  MSN states that it might be a
couple of days until they resolve the issues with blocked
mail. Apparently their new "Tough Butterfly" image has
some issue with Lapidary topics being treated as spam.

Thurmond
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Index to Today's Digest

01  RE: Index Gear Conversions
02  RE: Looking for a faceting design
03  RE: Index Gear Conversions
04  RE: "Optix" faceting
05  RE: "Optix" faceting
06  RE: Tumbling Questions and Cerium Oxide disposal.
07  RE: faceting design questions
08  RE: Gemcad problems
09  RE: Snake Eye


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Message:01

Subject: Re: Issue No.77 - Monday March 03, 2003
Date: Mon, 03 Mar 2003 18:17:24 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Don Rogers <Don@Campbell-gemstones.com>

At 07:43 PM 3/3/03 -0600, you wrote:
>Is there a formula or a simple method to convert faceting
>design instructions from a 96 index to a 64 indexor other
>index.

Hi
Gemcad will do the translation for you, and there are charts in Faceting
for Armatures that also allow the conversion.  BIG IF here.  You may end up
is partial indexes. IE 3.4 vs a 3 or a 4.

There are 1.5 indexes on a 96 tooth gear for each tooth on a 64 gear.  You
can translate a "3" index on a 96 to a "2" index on the 64.  A 1 or 2 index
on the 96 will not translate correctly, nor will a 4 or 5, but a 6
will.  Some cutters are willing to "cheat the difference", but that is a
brutal way to cut.  You really need a 96 tooth gear.  It is the standard
gear for cutting, and will work on almost all even numbered sided stones,
as well as most trillion/triangle stones.

A quick check to see if a design will translate, is to use a ratio
formula.  IE to see if a 6 index on a 96 gear will translate to a 64 gear,
the formula is 6/96=x/64.  If the answer is an even number, you can
translate without cheating.  If it is a decimal, cheating will be required.
You will need to spot check the design indexes.  If one of the design
indexes is an Odd number, you are out of luck, unless the new gear is a
multiple of the design gear.  IE a design of 96 and a new gear of 192.   If
all design indexes are even numbers, you can use a new gear of 1/2 the
number, IE you could use a 48 tooth gear. and all would still line up OK.

Don

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Message:02

Subject: RE: Looking for a faceting design
Date: Mon, 3 Mar 2003 18:18:11 -0800
To: <lapidary@caprock-spur.com>
From: "Arnold Schwabe" <ars80@telus.net>

I was reading Douglas Turet's kind offer of sharing his "Fire Arrow" design
with another member and read that he is having a few problems producing the
file in digital format. I have a copy of GemCAD and have the software to
export to a PDF file and am more than willing to offer my services (free of
charge of course) in producing a digital file that can be shared/emailed.
All that is requied is that Douglas forward the gemcad file to me. (I
promise I'll destroy my copy when I'm done.)

Arnold S.
ars80@telus.net

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Message:03

Subject: Transiton from 64 index
Date: Mon, 3 Mar 2003 21:41:28 -0500
To: <lapidary@caprock-spur.com>
From: "Tom Wilkie" <twilkie@mounet.com>

In Monday's digest, there was the question
"Is there a formula or a simple method to convert faceting
design instructions from a 96 index to a 64 indexor other
index."

In on page 98 of "Faceting for Amateurs"  by Vargas there is an
eight-fold transposition chart that should be helpful.

Tom Wilkie
Kingsport, TN.

__________________________________________________________
Message:04

Subject: Re: "Optix" faceting
Date: Mon, 3 Mar 2003 20:07:55 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: info@polymetricinc.com

On 3 Mar 2003, at 19:45, LapidaryArtsDigest wrote:

> Message:06
>
> Subject: "Optix" faceting
> Date: Sun, 2 Mar 2003 21:24:01 -0500
> To: <lapidary@caprock-spur.com>
> From: "Tom Wilkie" <twilkie@mounet.com>
>
> Someone asked me what the optix faceting method is.  I have no
> idea---help!!!!!!!
>
> Tom Wilkie
> Kingsport Tennessee

Hello Tom,
 To my knowledge the "Optix" is a registered trademark of Byrex
Inc. This is there own name for the style of cutting they are doing
on the OMF which is also known as concave faceting.


Zane Hoffman, President
Poly-Metric Instruments, Inc.
http://www.polymetricinc.com   info@polymetricinc.com

__________________________________________________________
Message:05

Subject: Re: "Optix" faceting
Date: Mon, 3 Mar 2003 20:13:53 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: info@polymetricinc.com

As an after thought, Byrex's web address is:
www.byrex.com
but for a quick view of the difference between flat and OMF concave
faceting here is a good look see !
http://www.byrex.com/omf.html


Zane Hoffman, President
Poly-Metric Instruments, Inc.
http://www.polymetricinc.com   info@polymetricinc.com

__________________________________________________________
Message:06

Subject: RE: Issue No.77 - Monday March 03, 2003
Date: Mon, 3 Mar 2003 23:28:09 -0500
To: "LapidaryArtsDigest" <lapidary@caprock-spur.com>
From: "Naomi Sarna" <nsarna@earthlink.net>

Hello all, Thanks to Tony, Denny and Ken for their responses to my inquires.
I'd forgotten about the leather, and tumbling certainly requires some
finesse. But I have more questions! I hate cerium oxide!!! It's so yucky!
Does anyone have a way of using it so it's not so greasy to get off?  Also,
I've looked in a few books regarding it's toxicity and haven't found much.
Any ideas?  Since it doesn't settle like silicon carbide, I'm stuck with
buckets of cloudy water I can't throw down the drain.  I live in New York
City and don't have a back yard to pour it onto.  And since I'm the landlord
I'd throttle myself if I sent it down the drain.  Is there anything which
will cause it to precipitate and sink so I could pour the water off? Thanks
again, Naomi in New York


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Message:07

Subject: faceting design questions
Date: Tue, 4 Mar 2003 01:03:28 -0600
To: "Facet Digest" <faceters@caprock-spur.com>
From: "Larry Davis" <ldavis32@cox.net>

If you are having a problem with converting from one design index plate to
another here is the answer.

Try getting on The Gemcad Web Page www.gemcad.info
and looking for my index conversion chart. 

Also if you download the Gemcad for Windows program from the
author at his site www.gemcad.com and have a look it will be able to
directly convert index plates for you on any design.


Larry Davis
Editor/Owner of The Gemcad Web Page www.gemcad.info

__________________________________________________________
Message:08

Subject: Gemcad problems
Date: Tue, 4 Mar 2003 01:08:07 -0600
To: "Facet Digest" <faceters@caprock-spur.com>
From: "Larry Davis" <ldavis32@cox.net>

Hi Doug.

If you will let me know what your problem is I may be able to help.

I missed the question that someone had asked and you were replying to but
if they have the ability to work with either DOS or Windows versions of
Gemcad
you can attach a copy of the .GEM file and send it to them.  That would be
over so
fast that you would still have your finger on the send key.

Otherwise... give me a holler.

Larry Davis
The Gemcad Web Page www.gemcad.info

__________________________________________________________
Message:09

Subject: Issue No.77 - Re: Snake Eye
Date: Tue, 04 Mar 2003 06:16:04 -0500
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Jim <jsmall47@earthlink.net>

John & Thurmond -
Thank you; I really appreciate how this forum works! I'm glad to get a
definitive answer to my question about this material. I believe the "snake
eye" label was likely created by the New Mexico cutter to help market the
finished stones. It is a delightful looking material, and (given the
popularity of gaspeite from Australia) there is definitely a market for it
in the US.

Jim Small
Small Wonders


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REFLECTIONS AND TIDBITS:


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