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LAPIDARY ARTS and FACETERS DIGEST
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Issue No. 250 - Friday, November 21, 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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Hi All, 

Effective immediately the digest will be published on a new schedule based
totaly on the membership posting volume. Member post drive the list so when
10 post are collected by the collection software  the list will be published.
If you want to see the list daily get those post in.

I am greatly pleased that the membership has responded to the above
by increasing the posting volume. It makes preperation of the digest
so much easier and worthwhile when there are more post.
Have a great weekend.

Great Job today. You got the post in so here is today's digest. Enjoy.

Thurmond

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Index to Today's Digest

01  NEW: Faceted Cabs
02  RE: saw blades / fixes
03  RE: Cerium Oxide vs Sapphire
04  RE: Lapidary Schools in or Near Florida
05  RE: Cerium Oxide vs Sapphire
06  RE: saw blades / fixes
07  RE: growing opal
08  RE: Larry White; Roanoke Valley Gem & Mineral Society
09  RE: Uvarovite Garnet
10  NEW: Identification of zinc vesrus tin laps
11  RE: Lapidary Schools in or Near Florida
12  NEW: Dressing Sintered Diamond Wheels

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Message:01

Subject: Faceted Cabs
Date: Thu, 20 Nov 2003 13:34:22 -0700
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: gems <gems@direcway.com>

Howdy List,
   Since it has been slow on the posting I thought I would post a new topic
for everyone to comment on.
   I got bored with cutting the same old material in the same old shapes so
I have started cutting faceted cabs for a little break. It is really fun to
get to work with new material and different shapes.
   I was wondering if any others have cut faceted cabs before? If so did you
like them? What is your favorite material to cab? What is your favorite
shape to cut cabs in? How do you handle the polishing of soft cabbing
material? Do you like high or low dome cabs, best? And, What is THE material
to cab in a bright red color? I have found cabbing material in almost every
color but red. Lapis is my favorite cabbing material so far.
   Hope this will generate a long thread and not start too many arguments.
The main thing is we have fun kicking it around.
Thanks,
Jerry Stroud
SLV Gems

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Message:02

Subject: saw blades / fixes
Date: Thu, 20 Nov 2003 17:31:04 -0500
To: "LapidaryArtsDigest" <lapidary@caprock-spur.com>
From: "Peter In Maine" <kulaczp@pivot.net>

Its not a good thing when we stick a blade in a rock.......It actually warps
the balde and a fix is not too easy......What I have done in the past is put
the blade on a piece of flat steel and use another piece of flat thick steel
to try and push it back into shape ( hammering that is)
I also have heated the blade with a butane torch and did the
same...........To be honest with you ,,,, does not work all the
time...especially if you really jammed the blade . it might never get back
to 100 %.........I have my 10 incher running out quite a bit right now too
after a jam up......makes for long work polishing out the ridges.........

Happy Thanks Giving To Everyone

Peter

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Message:03

Subject: Cerium Oxide vs Sapphire
Date: Thu, 20 Nov 2003 17:44:05 -0500
To: <lapidary@caprock-spur.com>
From: "dlevin" <stoneage@vermontel.net>

Hi Gail,

I'm not specifically familiar with the product sapphire.  You say it's
an Aluminum oxide?  If so, I often use Linde A which is an extremely
finely ground aluminum oxide.  First of all they are used sometimes for
different purposed.  The Linde A is far less aggressive than is the
Cerium.  But the stones types you mentioned, agate and opal are both
quartzes, for which cerium is excellent.  Some softer stones do better
with Alumina.  It really depends on the material. I have used leather
with polishes with good success.

The Chrome chalcedony I polished for a guy that showed up in the facet
section of December's LJ liked Alumina for a polish but was ruined by
cerium.  So I guess I'd say you just have to experiment.

Derek Levin

_______

Sapphire is Aluminum Oxide  as well just an older designation left over
from it use in Roman times. (from Master Gem Polishing by Gerald Wykoff)

Thurmond

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Message:04

Subject: Re: Issue No. 249 - Thursday, November 20, 2003
Date: Thu, 20 Nov 2003 20:53:53 EST
To: lapidary@caprock-spur.com
From: Rocksinhed@aol.com

In a message dated 11/20/2003 2:07:16 PM Central Standard Time,
lapidary@caprock-spur.com writes:
Subject: Lapidary courses
From: MXEVNS@aol.com
Date: Wed, 19 Nov 2003 20:40:22 EST

Hi. I am a newcomer to lapidary but really enjoy it. Would like to know where
I can go to learn the necessary skills. Much appreciated Max Evans, Jupiter
Florida.
Hi Max

 I have gone to many classes in Young Harris, GA.  The School is called
"William Holland Lapidary School". They cover every form of lapidary from faceting
to cabbing and even have courses on casting and jewelry making

 I no longer have the phone number .... does anyone on the digest have it?

 You can also contact the South Federation of Mineralogical Society who will
put you in contact with all your local clubs

Have a great day

 Jimmy Quigley      Thanks, Thurmond for keeping up the GREAT WORK !


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Message:05

Subject: Re: Cerium Oxide vs Sapphire
Date: Thu, 20 Nov 2003 17:49:37 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Tony <lightbender@thegemdoctor.com>

Hello Gail,

Well first off Cerium and Aluminium oxides are not really
interchangeable. They are used to polish different materials.
Cerium is essentially useless for polishing star sapphires and
chrysoberyl cats-eye. AlOx cam make a mess of coral, amber,
fluorite etc. 

I only rarely resort to my white faceting grade cerium oxide for
cab polishing as the pink stuff is way cheaper, works much
faster and provides an equal polish. I only use leather for very
specialised purposes. I have used a pellon lap for special
purposes for many years and a friend in the construction
business offered me some stuff that looks like a very loose
weave, coarser and thicker matted version of Pellon.

It is unbelievable, an almost instant perfect polish. My theory
is this happens because it can hold much more oxide polish than
any other pad I have used. Only trouble, it falls apart rapidly
and spins yarn, usually around the dop stick, I can rarely get a
dozen stones per pad. It's very cheap though. It is the most
used of my many polishing pads.

Tony,
In Vancouver, where the rain stopped, the sun came out and we saw
our mountains are now snow capped.

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Message:06

Subject: Re: bent saw blade
Date: Thu, 20 Nov 2003 18:05:10 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Tony <lightbender@thegemdoctor.com>

Hello Frank,

I hate to be the bearer of bad news but I fear your blade is
toast. Depending on the size it may be worthwhile returning it
to the maker for straightening. This is not cheap so if your
blade is less than 12 inches it's probably cheaper to replace
it.

More to the point is how to prevent it happening again. If this
is your trim saw you could add a guide and table made from
Plexiglas that will help prevent the blade from being twisted if
your grip fails. The table is simply a piece of Plexi cut to fit
the original saw bed. The slot for the blade is cut with the
diamond saw which now prevents sideways movement of the blade
whilst cutting. The other piece of Plexi just sits on the table
and can be adjusted to provide a fence or guide, this prevents
roaming blade wrecking cuts.

Tony.

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Message:07

Subject: Re: growing opal
Date: Thu, 20 Nov 2003 18:18:39 -0800
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: Tony <lightbender@thegemdoctor.com>

Hello Thurmond,

I don't have the article and I have a straight face...honest. Are
you going to start farming opals?  Patrick, the Australian Opal
dealer, ex miner, whose office I share, knows Len Cram, an
Australian miner, dealer, who is growing opals and has seen his
synthetics, he also has many other synthetics and simulants in
his collection, some are good, most are dreadful, but all are
obvious.

Tony.

_______

It is like this Tony. I live in an area that resembles the sedementary deposits of
Australia in many ways. I have suspected for some time that opal may be present here.
I also know that precious opal has been found in a dry creek bed not 6 miles from
my property. I have been desperately searching for info on Len Crams experiments
because I think that the information I gain may lead me to the correct geologic formation
to find the opal that I suspect in this area. I also am intensely interested in growing some
opal and would prefer using Len's approach than using highly refined chemicals. What I
have been able to glean from the meager info I have found concerning his methods
makes more sense than other methods I am slightly familiar with. I have about 5 square miles
of property to search. I am trying to obtain Oil exploration data to give me a better picture
of the subsurface here.

The precious opal is here. I can FEEL it calling. LOL

Thurmond

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Message:08

Subject: Re: Issue No. 249 - Thursday, November 20, 2003
Date: Thu, 20 Nov 2003 22:25:52 -0500 (EST)
To: lapidary@caprock-spur.com (LapidaryArtsDigest)
From: DaveWoolley@webtv.net (Dave Woolley)

RE: Larry White; Roanoke Valley Gem & Mineral Society

I hope to display the Beale/Woolley Depth of Cut Indicator on an Ultra
Tec and a Graves Mark IV . . . Friday, Saturday & Sunday.
Final repairs are being made on both machines.

Dave Woolley

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Message:09

Subject: Uvarovite Garnet
Date: Fri, 21 Nov 2003 00:01:22 -0500
To: <lapidary@caprock-spur.com>
From: "Lois Ritchie" <lbritchie@starpower.net>

Mine came from KBT Minerals,  703-281-3767.

Lois in Maryland

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Message:10

Subject: Identification of zinc vesrus tin laps
Date: Fri, 21 Nov 2003 07:45:33 +0200
To: lapidary@caprock-spur.com
From: Larry Bima <mlb@adsmr.co.za>

Hello all,

Is there a common or garden method of identifying zinc and tin laps,
i.e. telling them apart.

With thanks,
Larry Bima

__________________________________________________________
Message:11

Subject: to learn the necessary skills
Date: Fri, 21 Nov 2003 05:11:58 -0700
To: <lapidary@caprock-spur.com>
From: "jake" <efjke@msn.com>

"Hi.  I am a newcomer to lapidary but really enjoy it. Would like to know
where
I can go to learn the necessary skills."

Dear Mr. Evens,

You are in luck.  I looked on Bob's Rock Shop links for clubs.  Try Gem &
Mineral Society of the Palm Beaches.  The web site is
http://www.gemandmineral.cc  and the email is BNMJEFF@AOL.COM -  They   have
quite a bit to offer and they should be (as far as I could tell on a map)
well within 20 miles of Jupiter Fl.

  Also you may want to try the city and county for information on any
program they may have.  (I live in Ogden, and here they have several classes
in Riverdale, Clearfield, Layton, etc. as well.  I am sure the Palm Beach
club can supply more information, Hope that helps.

__________________________________________________________
Message:12

Subject: dressing
Date: Fri, 21 Nov 2003 19:49:54 +0600
To: <lapidary@caprock-spur.com>
From: "R&D" <r&d.gemonics@vinet.lk>

hi,
I have a diamond sintered wheel which is used for girdle cutting. It has
some waviness and that causes girdle chipping.If any one has an
experience, please explain me how to flatten the wheel.
Thanks


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TODAY'S FUNNY ~

Subject: TODAY'S FUNNY
Date: Thu, 20 Nov 2003 02:17:03 -0600
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Doug Smith <gembin@spiff.net>


Blonde Logic:

A blonde goes to the post office to buy stamps for her Christmas cards.

She says to the clerk, "May I have 50 Christmas stamps?"

The clerk says, "What denomination?"

The blonde says, "For gosh sakes! Has it come to this? Give me 6 Catholic,
12 Presbyterian, 10 Lutheran and 22 Baptists."

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TIDBITS AND REFLECTIONS~

Great ambition is the passion of a great character.
Those endowed with it may perform very good or
very bad acts. All depends on the principals which
direct them. 

---Napoleon Bonaparte---

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