[meteorite-list] avoirdupois ?

From: mafer <mafer_at_meteoritecentral.com>
Date: Thu Apr 22 10:22:35 2004
Message-ID: <005701c32e4d$4cc14580$6501a8c0_at_vs.shawcable.net>

Hi Tom
the use of avoirdupois measure is almost restricted to things other than
rock. What is common is the gram.
1 ounce avoir. equals 28.35 grams, 1 ounce troy equals 31.103 grams. What we
use is grams and kilograms (and of course, some sellers use pounds to help
those who can't quite grasp metric). Now, I understand that the opal dealers
use troy ounces in Australia, and that may be a standard outside of North
America (or better stated as a convention and not a rule) since, as defined
by the gemmological groups, one ounce equals 141 carats for gem weights
(this is a standard now, they decided to round it off to an whole number as
it used to be 141.75 carats to an ounce) and if you multiply 5 carats to a
gram times 28.35 grams to an ounce you get 141.75 carats. So, this standard
leaves out troy weights (which are typically used for precious metals)
altogether.
Thats the history in a nutshell. So, basicly, to make it simple after all
that, we don't use either really, just grams and kilograms and the ounces
are left out of the picture just so there isn't a problem.

Mark
----- Original Message -----
From: Tom aka James Knudson <knudson911_at_frontiernet.net>
To: meteorite-list <meteorite-list_at_meteoritecentral.com>
Sent: Sunday, June 08, 2003 10:28 PM
Subject: [meteorite-list] avoirdupois ?


> Hello List, This is meteorite related, it may not seem to be, but take it
> from me it is! I am so confused, do we use Avoirdupois or what? I was
doing
> a conversion and was given a few choices and do not know for sure? Can
some
> one explain this to me?
> Thanks, Tom
> The proudest member of the IMCA 6168
>
>
>
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Received on Mon 09 Jun 2003 02:06:11 AM PDT