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sarin versus gia cert

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robbonds

Rough_Rock
Joined
Jan 8, 2003
Messages
20
why would the gia cert say
table = 62%
depth = 66.5%

while the sarin says
table = 65.8%
depth 66.4%

why different tables? which is more accurate?
 

oldminer

Ideal_Rock
Trade
Joined
Sep 3, 2000
Messages
6,399
The GIA uses the Sarin Diamension. Is the new set of readings from a Diamension or a smaller unit called, the Brilliant Eye? The smaller one is less accurate and might be way out of calibration.

Truthfully, the GIA unit might have had an off day, too. One can't be certain without having the stone to re-measure.
 
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