Colored Diamond Info

DIAMOND & GEMSTONE INFORMATION => GIA Reports, Diamond Color Grading, Cut Questions => Topic started by: Diamondsbylauren on February 15, 2010, 06:39:12 PM

Title: Another great example why we don't rely on non GIA grading
Post by: Diamondsbylauren on February 15, 2010, 06:39:12 PM
HI Everyone!
This is a recurring theme- but it bears repeating.
There's no formula that consumers can use to "discount" an diamond "certified" by a non GIA lab.
This happens to be a lovely diamond.
It's a great color
The "layout" is nice- a lot of size for it's weight.
The imperfection is of a relatively"desirable"  nature and placement.
None of that wold cause GIA to grade this diamond SI2- as it was graded by an EGL outside the US.

I'm betting it would come back F color, maybe even G, with a clarity grade of I1 from GIA.
You can't grade diamonds from photos, but these give you a very good idea of the nature of this imperfection. It's too severe to garner an SI2 from GIA

I suppose the reason sellers continue to promote stones with such inaccurate grades is their success in selling them to uninitiated consumers.

Here's the key: The difference in price, based on the industry price guide is about double. Hefty motivation.

It bothers me as a diamond grader to see this going on- but more as a human guy- who detests lack of transparency in business.
Title: Re: Another great example why we don't rely on non GIA grading
Post by: shiba on February 15, 2010, 08:44:59 PM
I see a feather(?) and a shadow near the center, but it doesn't quite look like carbon.  Are these the reasons for the I grade?  Otherwise I think it looks pretty nice.  Stats?

What is the motivation for other labs to be so loose on their grades? 
Title: Re: Another great example why we don't rely on non GIA grading
Post by: Diamondsbylauren on February 15, 2010, 09:02:48 PM
Good question Shiba- I should have pointed it out better
Title: Re: Another great example why we don't rely on non GIA grading
Post by: Mrs Mitchell on February 16, 2010, 04:17:35 AM
I had no idea that the price difference between those grades would be so much.
I think it's a very respectable I1, though. Nice diamond.
Title: Re: Another great example why we don't rely on non GIA grading
Post by: oldmancoyote on February 16, 2010, 06:18:51 AM
[snip]
What is the motivation for other labs to be so loose on their grades? 

Bear in mind that a grading report is first and foremost a marketing tool for the seller - particularly for the retail seller. At this point, as a lab, you have two choices:

1. You establish yourself as the reference for the consumer. The seller buys your services because it helps his credibility. That's what GIA and AGSL do.

2. You do what the seller wants - grade soft. The seller buys your services because it helps him position the stone where he wants. That's what most other labs do.

Unfortunately, route 1. is the toughest to take, and once you start straying onto route 2. it's very difficult to recover and go back.
Title: Re: Another great example why we don't rely on non GIA grading
Post by: shiba on February 16, 2010, 11:48:45 AM
Gotcha.  I hoping there must have been a much more scientific reason. 

Now David.....Stats?  If this baby is big enough, I may have to forgo my light yellow radiant dreams.  Especially since she is 50% off.

...hehe get it?  ;)
Title: Re: Another great example why we don't rely on non GIA grading
Post by: oldmancoyote on February 16, 2010, 12:15:27 PM
Actually, now that I think about it, there is another reason, which I summarily described as "Route 1 being tougher": it's also a lot more expensive.
Title: Re: Another great example why we don't rely on non GIA grading
Post by: Diamondsbylauren on February 16, 2010, 07:21:26 PM
Gotcha.  I hoping there must have been a much more scientific reason. 

Now David.....Stats?  If this baby is big enough, I may have to forgo my light yellow radiant dreams.  Especially since she is 50% off.

...hehe get it?  ;)

Let's see....
2.39cts.
I'll trust the EGL measurements...
8.80 x 6.90 x 4.75
Depth 68.6
Table 71
No fl
The diamond would list on the site for about $$13k  although if I was to base that on the asking price by the cutter we'd be at a lot more.
Title: Re: Another great example why we don't rely on non GIA grading
Post by: shiba on February 16, 2010, 09:53:40 PM
Gosh, she is a nice size!
Title: Re: Another great example why we don't rely on non GIA grading
Post by: saqsay1 on February 24, 2010, 08:23:40 PM
what a beauty! while i am not a huge fan of radiants, this one is beautiful. i could live with that feather.