Peter W.. Rowe, schrieb:
> On Sat, 21 Jun 2008 17:30:59 -0700, in rec.crafts.jewelry Abrasha
> <abrasha@[EMAIL PROTECTED]
> wrote:
>
>>> In all seriousness. If you would buy a diamond from me, I would only
>>> want to sell you a diamond with a GIA certificate. That way you have
>>> some assurances, that the diamond you get is worth what you paid for
it,
>>> plus you can compare the specs and price to other identical or similar
>>> stones.
>
> Good recommendation. I'd add that the AGS certificates also seem to be
> trustworthy. There are a couple other labs issuing certs that are
widely used,
> notably EGL. They're often not quite as reliable and accurate in their
grading
> as GIA and AGS. GIA devised the grading scale usually used, and AGS
also
> defines the ****tions of it's scale that differ, so each is using it's
own
> "ruler". This differs from other labs that usually use the GIA scale,
but often
> don't do it quite as stringently as the originators of the scales
intend. EGL
> is notorious for being a bit loose in their grading, so stones with EGL
certs
> often seem to cost a bit less than same sounding stones with AGS or GIA
certs.
> They're not better deals automatically. Often, they are stones that
would come
> back from AGS or GIA with the color or clarity listed one grade below
what the
> EGL cert claims, thus explaining the apparent differences in cost.
Stay away
> from stones with certificates issued by the seller, small local labs, or
any lab
> that's not nationally recognized and used by a wide range of dealers.
They may
> be fine, and might be quite good enough when you own a stone and need to
have
> some do***entation on it in order to get insurance or something. But to
really
> verify grades, qualites, and value, you're best off with GIA or AGS as
the lab
> that does the cert. The AGS scales are different looking from the GIA
scales,
> but the actual standards for each grade are similar, so comparing from
one lab
> to the other is easy and valid.
>
> cheers
>
> Peter
For Europe, You might add HRD and FGA certificates into the recommendation
list, as well as IGI certificates if these certificate are dated in this
century.
Mit freundlichem Gruß,
Heinrich Butschal
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