after looking through 6 differnet reports 2 from the appraiser, sarin and ogi ...

[Dancing Fire]

this is (6)different (4) sarin and (2) OGI reports the numbers below are the average from each individual report.and here's the variance as follows: (HCA range 1.1-1. all depends which report to believe

table 56.3-55.7
depth 61.1-60.8
cr. angle 34.6-34.2
pav angle 41-40.8
weight 3.335-3.36

and notice the diameter variance on gog's site(OGI report). 0.8% makes the stone seem out of round.,where the other reports is 0.3%. Also look at the table percentage.Wide range there also.(55.7-56.

in today's high tech world, you would think they have a machine that is more consistant in accuracy. I am no expert but here is my advise. First ask the vendor to give you their opinion on the stone. Then have it shipped to you. If it passes your eye test, have an independent appraiser to look at it and get their opinion.It didn't happen in this particular case, but imagine this, let's say gia report has a stone weight 3.00 ct., and all the other reports has it weigth less than 3.00 ct. imagine the chaos it would cause; being that magic number,because the price difference per ct. can add up to a few thousand dollars difference for the stone so what should the buyer and the vendor do in this case? which # to believe ?

Here's the stone

 

[Magnum]

"in today's high tech world, you would think they have a machine that is more consistant in accuracy"

apparently, according to Cut Nut, OctoNus and and MSU developed a more accurate 3D scanner called Helium that is much better than today's sarin machines. Also, there are different qualities of sarin machines today. Was your diamond analized on the best (and most expensive) sarin model all six times? Regardless, I don't think the vatiance is that bad. I don't have all six measurements, but assuming they were evenly distributed, you could look at the numbers this way:

table 56 +/- 0.3
depth 60.95 +/- 0.15
cr. angle 34.4 +/- 0.2
pav angle 40.9 +/- 0.1
weight 3.3475 +/- 0.0125

It doesn't look too bad to me when you look at the numbers this way.

 

[Dancing Fire]

Still wonder what would happen if the cert say 3 ct and the sarin say it weigth < 3 ct , which price range to used ?

 

[strmrdr]

Date: 12/7/2004 9:15:44 PM
Author: Dancing Fire
Still wonder what would happen if the cert say 3 ct and the sarin say it weigth < 3 ct , which price range to used ?

Which ever one it actually weighed on a scale maybe?

 

[Garry H (Cut Nut)]

A scanner estimates the volume and multiplys by specific gravity which has a small variance.

Before scanners the accuracy was terrible compared to Sarin and took 20 times longer.
Helium is a next generation approach, but there will still be small discrepencies - the table is hard to measure because the stone sits on it.

 

[Dancing Fire]

Date: 12/7/2004 9:19:52 PM
Author: strmrdr

Date: 12/7/2004 9:15:44 PM
Author: Dancing Fire
Still wonder what would happen if the cert say 3 ct and the sarin say it weigth < 3 ct , which price range to used ?

Which ever one it actually weighed on a scale maybe?

just imagine the scale reads 2.999 ct the buyer can save thousands of $$$[$$)]

 

[Garry H (Cut Nut)]

2.999 = 3.00ct
2,998 = 2.99ct

 

[Dancing Fire]

Date: 12/8/2004 12:36

7 AM
Author: Garry H (Cut Nut)
2.999 = 3.00ct
2,998 = 2.99ct

cut nut
o.k....i''ll pay the 2.998 per ct price.

 

[Garry H (Cut Nut)]

Remember; it''s harder to find a "CLEAN MIND"