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GIA plots: colors!

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moremoremore

moremoremore

Ideal_Rock
Joined
Mar 15, 2004
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6,825
Just wondering-

I was just lusting after the cert on my new stone (online, not in person) and I just noticed that e/t the scan of the cert is in color...and the crystal of course shows up red...I THINK the feathers look to be a different color? I thought they were feathers b/c they are the only other inclusions listed on the cert...not really a bright green...maybe those aren't even little feathers...they look gray to me. the feathers would be red, right?...maybe they are "blemishes" ? But it doesn't look that green...Maybe it's the color of the scan...I could only see the larger crystal with the loupe in the store- I couldn't see any other crystals..

Here is the plot...click on grading report...
http://www.bluenile.com/diamonds_details.asp?pid=LD00327180&item=1_58&filter_id=0&sec=&query=&page=1&sortby=ranking

Who cares! But I was curious...always learning...

As if I couldn't love the stone more...I think I do!
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I could email Mark but I don't want to bother...just wondering if someone knew.

Did I mention I'm EXCITED!!!! I get the ring on saturday!
 
On the GIA site, it looks like crystals & feathers are in red... unless it's just not showing up correctly on my computer...? (hover over the 'key to symbols' area on the right of the new GIA certs) LINK
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I hope you have your camera ready on Sat - cuz i'm lookin fwd to seeing LOTsa pix!!
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LOL...my picture taking skills..not to great!
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The only thing is, on the cert itself, the only thing that looks red is the crystal on the lower left...Alexah..can you take a peek and tell me if the colors are diff on your monitor?
 
honestly i can't tell on my monitor - they could all be red or different colors
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...darned crappy scan
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Here's a list of blemishes (which are plotted in green):

Blemishes:

Abrasion - tiny chips along facet junctions, producing white fuzzy lines instead of shart facet edges

Extra Facet - a facet placed without regard for symmetry and not required by the cutting style

Natural - part of the originial crystal surface remaining on the polished stone

Nick - a small notch near the girdle or a facet edge

Pit - a tiny opening, often looking like a white dot

Polish Lines - tiny parallel scratches left by polishing; fine parallel ridges on a polished facet, caused by crystal structure irregularities; or tiny, parallel, polished grooves produced by irregularities in the scaife surface

Polish Mark - surface clouding caused by excessive heat, or uneven polished surface resulting from structural irregularities

Rough Girdle - a graininy or pitted girdle surface, often with chips

Scratch - a linear indentation normally seen as a fine white line, curved or straight

Surface Graining - surface indication or structural irregularity; may resemble faint facet junction lines, or cause a grooved or wavy surface



Crystals and Feathers are considered Inclusions which are normally plotted in red.
 
Right, but do the little dots look green on my cert? I can't tell. They look different from the main crystal which is clearly red!
 
I couldn't tell on my monitor at work (but it is a crappy monitor).

Can't wait to see your stone though.
 
I can't tell on mine either.
 
Thanks guys...I could email Mark LOL...guess that's the easiest way instead of us all going blind...but it's no biggie...I'll see on SATURDAY!!!!!!!!!!
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I really can't tell... I saved the image and fiddled with it in PhotoShop, but it's impossible to make out the color... Sorry!




I can't WAIT till you have that rock and post pictures!!!
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MMM, I have a great monitor, and I still couldn't tell. The only thing I picked up on is that the intensity of color between the two is clearly different. Whether one is a lighter red or green, I was not able to tell. Sorry. Can't wait to see this beauty!!!

Shay
 
Post retracted.
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You know I love you JFlo...but easy there. I'm interested in learning what the inclusions are..and didn't want to bother Mark. I think you'd be curious to know what the inclusions were if you couldn't tell from the cert. So YOU relax.
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Thanks Rich- I broke down and emailed Mark who confirmed they are red. Not that I care...I couldn't see them!
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Why would some be lighter and some darker? I bet darker b/c it's a few together. Interesting stuff! Thanks.
 


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On 10/20/2004 8:25:05 PM moremoremore wrote:





Why would some be lighter and some darker? I bet darker b/c it's a few together. Interesting stuff! Thanks.
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Do you mean lighter or darker red on the plot? If so, it depends on the color of the ballpoint pen being used. Or it could be how hard they pressed down on the pen when they were plotting the feathers versus the crystal.



When I did the Diamond Grading Class at the GIA, they give you ballpoint pens to use when plotting stones, a green pen to plot the blemishes, and a red pen to plot the inclusions.

Click to expand...
 
cflutist...but wouldn't they all be light on the cert then? It looks to me like the crystals on the lower left are more concentrated so it looks darker? Dunno.

Did you take the class for fun? Was it really interesting? I love to keep learning about all this good stuff!
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How long did the class last?

Mark told me that people have been eyeballing my cushion b/c it's so purdy!
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MMM, my personal opinion is that you are worrying for nothing. As Richard said, with the characteristics identified (crystal and feather), they are plotted in red. The shade of red doesn't matter. Like I said in my previous post it could be how hard the person pressed down on the pen when they were doing the plot ... you know, sometimes you write harder than other times?

As far as taking the classes, the Internet did not really exist when I was shopping for diamonds in the mid 1980s. And since Consumer Reports didn't talk about diamonds and since I enjoyed jewelry so much, I decided to get my Gemologist Diploma from the GIA via their Distance Learning Department (aka Home Study). You had to pass classes in Diamonds, Diamond Grading, Colored Stones, Colored Stone Grading, and Gem Identification. They actually mailed you diamonds and colored stones to grade and identify. It was a lot of fun but stressful at the same time. To pass the Gem ID class, you had to correctly identify 20 unknown stones. If you missed even one, you failed the test.

I don't work in full time in the business though, so I am a little rusty (am a Consultant in the IT business).
 
Again, I'm NOT worried. I am interested.

That's interesting if it's the pen pressure. I think that's misleading..people may see a strong red and shy away from stones. Thanks for the info!
 
The plot map is used to show the location of the inclusions/blemishes. It is not intended to show how visable they are under 10x based on how dark the ink appears to be. Richard, please correct me if I am wrong.
 
no, you're absolutely right. Grading and plotting have nothing to do with visibility....Where an inclusion is darker and bigger from the pressure, it might make the inclusion look bigger than it actually is...the bigger it is...the higher the chances you can see it (depending on the type of inclusion)...so people might look at a cert and say nono!

In my case though, I believe that there is a small group there (the darkest marks)...Anyhoo..thanks for the info...this stuff is crazy!
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On 10/20/2004 11:29:13 PM moremoremore wrote:

no, you're absolutely right. Grading and plotting have nothing to do with visibility....Where an inclusion is darker and bigger from the pressure, it might make the inclusion look bigger than it actually is...the bigger it is...the higher the chances you can see it (depending on the type of inclusion)...so people might look at a cert and say nono!
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Click to expand...


When my jeweler first showed me my stone, I saw nothing. When I louped it the first time, I saw nothing. I got nervous--oh no, I thought, this must be a VVS and it'll be a gazillion dollars! I asked him and he said "SI2" I said, "whatchya talkin' 'bout, Willis?" and he brought out the plot....and there it was, a single crown feather...I looked again with the loupe and when I tilted the stone just so, I could see it. I was amazed.

If I had seen the plot first, I would have said "not interetsed." This diamond business is a crazy thing, I agree.
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Now, after all this, I want PICTURES PICTURES PICTURES of this amazing, crystal clear, white , sparkly kick a** cushion cut stone! (or esle).
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If an inclusion is more or less obvious, the plotter will try and reflect this in the pen stroke they use to depict the inclusion.

More obvious, heavier red line. Less obvious, lighter red line.
 
Thanks Rich, I guess I had forgotten that after 15 years and no practice.
 
MMM~
I can't believe you started this thread! You are too funny! Had you PM'd me, I could of told you they were red--they show up well on my monitor!
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So are you dying of anticipation?!?!? I would be in your shoes!!! Has Mark sent you any pics of the final ring that you can post?
 
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