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Fancy Colored Diamonds
Topic Started: Dec 11 2010, 09:24 PM (857 Views)
kenny
HOLY CARP!!!
Piano*Dad
Dec 13 2010, 11:38 AM
Yes, except mine is actually deeper than that (I think). The angle in this stone seems more shallow.

I have noticed no "bow tie" in this stone. It was appraised at a hefty amount quite a number of years ago. I hesitate to think what the 5.6 ct monster Mik describes is worth.
Keep in mind gem "appraisals" are a can of worms.
Retail "value" can vary by 50% depending on venue.
Is it being sold at Tiffany on 5th Ave., or on the Internet shipped from Bangkok?

Next the used market means a lower value, even though legit vendors often cannot give written guarantee their "new" diamonds are not previously owned and recut.

If you want to hear a real joke, every white diamond I have bought came with an "appraisal" from an "independent" appraiser that put the "value" at around 30% more than I paid.
Hahaha.
These are legit sellers, even Bluenile.

Mik if she doesn't have a GIA report on that honker I recommend she get one.
Lots of handed down family gems turn out to be unpleasant surprises.
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Piano*Dad
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Bull-Carp
Here's a simple diagram that seems useful:

Posted Image
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Piano*Dad
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Bull-Carp
Kenny,

I do know that appraisals vary in quality. This was a paid assessment from a professional jeweler. It wasn't just a "how much is it worth" statement. It was a complete assessment of the quality and characteristics of the stone. That said, even this paid evaluation is just an opinion.
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kenny
HOLY CARP!!!
Yes depth is from culet to table.
Depth is expressed as percentage of face down diameter (for a non-round the most narrow diameter).
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kenny
HOLY CARP!!!
Piano*Dad
Dec 13 2010, 11:48 AM
Kenny,

I do know that appraisals vary in quality. This was a paid assessment from a professional jeweler. It wasn't just a "how much is it worth" statement. It was a complete assessment of the quality and characteristics of the stone.
A GIA or AGS report is the ONLY paper that is going to get an informed buyer to pull out their checkbook.

Plus anyone who sells diamonds has an inherent conflict of interest when evaluating stones they didn't sell.
If you want an appraiser hire a professional with a GG (graduate gemologist from GIA) who makes their living selling nothing but this professional service.
Even then the weight of their appraisal pales in comparison with a real lab report from GIA or AGS.
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Piano*Dad
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Bull-Carp
I can go back and look at the paperwork, but I believe it was one of those. In any case, I'm not planning to sell the stone.
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kenny
HOLY CARP!!!
No problem.
I'm just saying the value varies wildly depending on grades.
I can show you two stones that look identical to the novice one being worth $3000, the other being $60,000.
You want believable grades when buying/selling/insuring a stone.

It is widely agreed that GIA and AGS offer the most consistent and believable grades.

Also know that (if you read the fine print on the back of the grading report) even those two labs reserve a one grade margin of "slop" for lack of a better term.
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Piano*Dad
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Grading is an art, I suspect. Ask ten professionals to grade a stone and they won't all line up on exactly the same score.
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kenny
HOLY CARP!!!
Sort of true.
GIA has more than one trained human look at each stone independently under a tightly controlled environment and lighting conditions.
Very important stones get more humans involved.

While not perfect GIA and AGS have the best reputation of repeatability of any grading entity.
There is no higher authority.

The companies that send their diamonds to GIA are very smart and they scream their little heads off if grades come in too low.
Tons of money is at stake.

Grades coming in too high has also happened at GIA. :tsktsk:
In fact, Google GIA Certifigate, note the g.
It was a huge shocking scandal a few years ago at GIA.
Some high-ups in cahoots with the stone's owners gave generous grades to some very expensive stones.
Heads rolled.
It harmed GIA's image but as you can expect now they are working to be seen as more ethical than ever.

Overall, GIA is still the best lab around (though AGS is better for cut grading, more pro-consumer than pro-industry) and this scandal has really been a wake up call.
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