LAPIDARY ARTS and FACETERS DIGEST
Issue No.79 - Wednesday March 05, 2003
Moderated by: Thurmond Moore III
Committed to carrying on the fine works of
Hale Sweeny and Jerry Dewbre
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From the Moderator: MSN's blocking issues
have been corrected so the digest should now
reach MSN members.
Index to Today's Digest
01 RE: Disposing of Cerium Oxide
02 RE: Disposing of Cerium Oxide
03 RE: Disposing of Cerium Oxide
04 RE: Fire Arrow/GemCAD
05 RE: 96 to 64 index conversions
Subject: Re: Disposing of Tumbling Gook
Date: Tue, 04 Mar 2003 13:23:58 -0700
To: LapidaryArtsDigest <firstname.lastname@example.org>
From: John McLaughlin <email@example.com>
> From: "Naomi Sarna" <firstname.lastname@example.org>
> . . .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?
Take a look at http://www.alliedhightech.com/msds/CeriumOxide.pdf
a Material Safety Data Sheet for Cerium Oxide. It has a low toxicity, but should not be
breathed. I don't know why it seems greasy. I use it frequently as a polishing compound
(usually mixed with a bit of Linde A) and it cleans up quickly with plain water. For
quartz based stones (agates, chalcedony, amethyst, etc.) it is hard to beat. If your
material is pink or reddish you have iron oxide in it. The best ceruim oxide is white,
containing no rust.
Anything coming out of your tumbler has the potential to set up like cement in your
drains. While you have the advantage of blaming it on a tenant, nothing from a tumbler
should be poured down a drain. Instead, get some shallow pans and pour the materials
into the pans. Let the stuff dry and harden and then disposed of it in the trash. If it
does not dry in a reasonable amount of time, tell the landlord to turn up the heat! When
dry it's just rock and should not pose a hazard to the seagulls that pick through the New
As for your hatred of cerium oxide, you have three options. Yoga, Cerium Oxide Phobia
Self-Help Group (COPSHG) or Paxil.
Subject: Cerium Oxide
Date: Wed, 5 Mar 2003 09:37:10 -0600
From: "hankswan" <email@example.com>
Naomi, Cerium Oxide is not a bad chemical like some of the items we use as
lapidaries. Do not breath it in (dust) and do not eat it and you should be
ok. If you buy the economy pack of coffee filters and filter the Cerium
Oxide saturated water through several filters, you should be able to remove
95% of the Cerium Oxide from the water. Pour the water down the drain and
throw the filters away. Common sense use of this and other chemicals we use
should prevent problems. Hope this helps you.
Subject: RE: Cerium Oxide
Date: Wed, 5 Mar 2003 11:31:07 -0700
From: "Cox SMTP west" <firstname.lastname@example.org>
1. Make a basket out of chicken wire that is big enough to hold a brown
paper bag, and has a lip (or make hooks) to hold the basket in the top
of a bucket.
2. Place two brown paper bags (one inside the other) in the chicken wire
basket, and place the basket in the top of a bucket.
3. Pour the Cerium liquids into the paper bags. The paper bags act as a
filter and will catch most of the Cerium Oxide. Let the bags and cerium
to dry out and put in your household trash. The filtered water should
now be free of most of the cerium and can be dumped down your drain.
I hope my instructions are clear enough to understand.
Instead of using chicken wire you might find a wire waste paper basket
the correct size. All you need is some support for the paper bags so
they don't come apart when soaked with water.
Subject: Re: Fire Arrow/GemCAD
Date: Tue, 04 Mar 2003 23:41:39 -0500
To: email@example.com, firstname.lastname@example.org
From: "Douglas Turet" <email@example.com>
Thank you for your consideration and generosity. If you'll provide me
with a snail mail address, I'll dig out the Fire Arrow's paperwork and
sketches, and send photocopies your way. Above and beyond everything else,
it'll be nice to see the cut in digital "life", after extrapolating it, all
All my best,
Douglas Turet, GJ
Lapidary Artist, Designer & Goldsmith.
P. O. Box 162
Arlington, MA 02476, U.S.A.
Tel. (617) 325-5328
Fax: (928) 222-0815
Subject: 96 to 64
Date: Tue, 4 Mar 2003 20:30:22 -0600
From: "CHARLES COVILL" <firstname.lastname@example.org>
This may help a 64 index is 2/3 of a 96 index. to convert from a 96
index to a 64 index multiply the 96 by 2 then divide by three. Or if you
choose just multiply the 96 by ,666667.
Or you can make a chart, draw a circle and divide it into 64 equal
segments. now make a slightly larger circle, using the came center
point, divide the larger circle into
96 equal parts. now a line from the center out will intersect both
circles. Note that at 24 on the 96 index circle the line will intersect
16 on the 64 index circle.
By math 96/3 times 2 = 64 and 24/3 x2=16
I hope this helps.
Charles in Austin
Hi Charles, Glad to see MSN mail moving again. The digest was blocked
by MSN for about the last two weeks.
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