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This list digest contains the following message subjects:

1. LapDigest News for Issue No. 33 Wedesday, 7/23/97
2. NEW: Abrasive Grit Sizes
3. NEW: Ganoskin WebSite Search Engine
4. RE: Copyright Release
5. BIO: Carla
6. BIO: Jeremy Condliffe


Subject: LapDigest News for Issue No. 33 Wedesday, 7/23/97

Some of you may have noticed that there was no issue yesterday. This was because there were no letters to publish!

I know I told you that I was going on a trip -- well, my wife became a bit
under the weather, so we aren't going. Please send in replies and queries,
or there won't be anything to publish tomorrow!

I added a table from Brenda below - with some concern as to how it will
come out. Tables just seem to get jangled out of shape - hopefully you can
still read it.

Each author is requested to write the words "-- non-commercial republish
permission granted --" at the end of every item submitted. This gives
permission for others to use your item for non-commercial purposes.


From: Brenda Kutz <>
Date: Mon, 21 Jul 1997 12:01:28 -0500

Subject: NEW: Abrasive Grit Sizes

I have seen a few requests for grit size comparisons. I remember seeing a
line diagram showing the size relationships in the Buehler catalog. I went
to their homepage ( ). Apparently, they have
only their equipment on the web. I asked if they could mail me a copy of
the diagram. What I received was a copy of their consumables catalog, which
contains a table comparing the grit sizes for abrasive belts. I'm including
just a few of the numbers:

Grit number
European USA Grit Emery FEPA "P" ANSI
(P-grade) (CAMI) Grit Microns Microns
--------- --------- ------ -------- -------

60 60 N/A 260 268
100 100 N/A 145 141
120 120 N/A 127 116
220 220 N/A 65 60
P280 280 1 52.2 42.3
P320 320 1/0 46.2 34.3
P400 400 2/0 35.0 22.1
P600 600 3/0 25.8 14.5
P800 800 4/0 21.8 6.8
P1200 1200 --- 15.3 2.5
P4000 ---- --- 3.0 ----

I hope this helps.


+=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +=+ +
(Ed. Note: Thanks, Brenda, for the table. I believe that the first three
columns identify ways of designating sizes of grits. We would use the
second one here in the US for the usual abrasives and the third one for
emery. The last two columns presumably give the average diameter of a
single grain of abrasive. I believe the ANSI column is the American
standard. For those of us who din't know such things (until I looked it
up), a micron is unit of length equal to one thousandths of a millimeter,
or about 0.00004 inches.

A very complete source for these kind of data is GEMSTONE & MINERAL DATA
BOOK by John Sinkankas. He devotes an entire Chapter (4) to abrasives,
their sizes, terminology, and information on buffs, laps and so on. Incidently. this book is high on my list of recommended lapidary references to have around.) -- hale

From: Dr. E. Aspler <>
Date: Tues, 22 Jul 1997

Subject: NEW: Ganoskin WebSite Search Engine


We at Ganoksin.Com are pleased to announce that We developed for
us and the Gem and Jewelry Industry community a search engine
which guaranties that your WebSite can be found easily on the net.

** Registration is Free **

Web links are stored in a our database under the following

** Categories **

Arts ..... Online Galleries ..... Jewelry Shows & Calenders
Jewelry - Retailers ..... Jewelry Manufacturers - Wholesalers
Gemstone Dealers ..... Gemstones - Rough and Treatment
Diamond Dealers ..... Tools and Equipments ..... Metal Sites
Books & Publications ..... Schools & Workshops ..... Web Reference
News Groups & Mailing Lists ..... Institutions & Organizations
Search Engines & Directories

** Easy and Immediate Registration **

Register your web site on the search engine now! To register just point
your browser to:

Note: Only Art, Gemstones, Jewelry and metal sites will be accepted to
register in the search engine.

Date: Wed, 23 Jul 1997

Subject: RE: Copyright Release

Greetings my friends:

Please feel free to reprint, any, and all communications to this group,
ORIGINATING FROM MYSELF, Vincent T. King, in ANY publication that would go
towards the introduction, teaching, or furtherment of this hobby or craft.

Blanket Statement. Dangerous? Why? If you are brilliant enough to make a
buck off my tirades, Blessings be unto you! Those who may wish to retain
this knowledge for personal gain, I salute you. I respect your decision.
Now respect mine.

We have before us, this small group of individuals, an enormous power to
TEACH! AND BE TAUGHT! Not only within this group, but to those who may
one day join us in our interests. The scope and power that the Internet
provides in resourcing information is yet unrealized or understood. World
wide communications that allow us to trade information half a world away.
If we spend a lifetime gaining knowledge and fail to pass it on to the next
generation, be they our children, or neighbors, our lives have been wasted.

If we demand recompense in the form or royalties, only to have our visions
rot on the shelves of the local library, it's still been wasted. It staggers
me to consider the enormous amount of truth that returned to dust because of
misguided self worth. Should a topic arise that you claim proprietorship
too, simply say nothing.

I thank God that Mr George Butts did not take the attitude, "Send me $10.00
and I'll share my experience". He still wouldn't have my ten dollars, and
I'd still be floundering with cutting difficulties! Because he did share,
I'm now willing to invest $20.00 with him. So far his ideas are working,
and they'll work for you. He didn't ask for a dime, or even a thank you,
and he deserves both. Thank You Mr. Butts.

I suspect that there'd be more to gain by increasing long term interest
in the craft, than short term revenues. Publish my thoughts, increase
awareness of this dying art. In the end, we will all win anyway! If
there's something that I can not discuss, it'll be so stated.

One last point, at the multitude of shows that are attended in various
guises, I find myself to be among the youngest of the group, and I'm 35.
If we're quiet in our teachings, surely no one will follow.

[non-commercial republish permission granted]

Date: Wed, 23 Jul 1997

Subject: RE: BIO Carla

Welcome to the family, Carla. Welcome to the wonderful world of gem cutting.
The amount of insight one will find from within these pages is quite
extrordinary. A man wiser than I once said, "If you can Smell it, You're
breathing it" (Herbert J. King).

Looking forword to your input. By the way, anybody out there got any Snake
Skin agate they'd be willing to part with?

[non-commercial republish permission granted]

Date: Tue, 22 Jul 1997

Subject: BIO: Jeremy Condliffe

Hello there everyone,

My name is Jeremy Condliffe and I'm 35, and the editor of a small weekly
paid for newspaper in Cheshire, England, the "Congleton Chronicle"

In my spare time (eh? what's that <g>) I am studying for an earth sciences
degree with the Open University, a distance learning school in England, and
the best in the world of its type.

So far, I've done units on introductory geology, seismic stuff ("How the
earth works" it was called") oceanography, and earth's resources, and this
year I'm studying sedimentary basin analysis. I've just got back from a
week's summer school on the east coast of England - brilliant but more to
do with structural geology than "lapping".

I try to get out in the field whenever possible but as I have a demanding
job and an even more demanding child at home it's nowhere near as often as
I like.

I recently bought a new tumbler and am in the process of deciding what I
like and what I don't, purely for my own interest as I can't see me
producing enough to make any money and I never like to give nice rocks away,
let along ones I've polished. I'd like to do some cabs when I get a bit more
experience and my course is over for the year - it runs Feb - Oct.

The very first digest I received was packed with info so I'll probably hang
around <g>

I've got a web site with news of the Congleton Chronicle on, for expats
living overseas and there's also some geology on, of this local area and
the salt mine at Winsford.

It's at

Any comments/tips/additions/corrections much appreciated.

I'll probably lurk for a bit now, just to see what's going on

Bye for now


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