Colour diamond?

[Agar40]

I appreciate in advance any reply concerning my inquiry and I'm grateful for the privilege to be able to ask the experts in here for help. I have this stone in my collection that I unmounted from its original setting and its image is under the topic on a table down position. It contains dark sulfide inclusion and graining lines, etc. In addition. it has cross-hatched “tatami”strain pattern in the inside. I was told it's a natural color. Can anyone help to confirm that? Thanks!

 

[kenny]

I doubt it is a real fully-natural Fancy Colored Diamond, FCD.
I've never seen any diamond with a girdle with convex sides.
That sounds challenging to polish and would waste rough/weight.

FCDs are ultra-expensive so they shouldn't be bought based on the word of the seller.
FCDs should be accompanied by a grading report from a reputable gem lab, preferably GIA.
If it was inexpensive there is NO way it is fully natural.

BTW two things can be natural, or not - the material and the color.
If the stone was mined from the earth, the material is natural.
When they are grown in a lab the material is of course not natural.
But, even if it was mined from the earth the color itself may be the result of treatments in a lab.
Alternately, it may have come out of the earth that color.

IMO, sellers should not call FCDs natural unless the origin of both material and color are nature.
Unfortunately many sellers of diamonds with natural material and treated color call them, "natural".

GIA is the gold-standard lab for determining the origin of the material and the color.
Without a GIA report I'd never pay much for an FCD someone claimed was "natural".

Can you post some pics of it on a white surface, face up?
How big is it?
What did you pay, and where did you buy it?
Was the setting you removed it from platinum or gold?
If not it is almost certainly not a real diamond.

 

[diamondenvy1]

If it has inclusions, it is likely a natural stone, as synthetics are flawless. The picture makes it hard to tell if it is a diamond though. I have to agree with Kenny on this one and say that it would be highly unlikely that someone cut a FCD that shape.

 

[Texas Leaguer]

Kenny laid it out well. Very unlikely that it is a diamond. I only say 'unlikely' because anything is possible. I suppose.

Glass can have strain patterns like you describe. Not sure what a sulfide inclusion is. I'm pretty sure I have never heard of one being associated with a diamond. Synthetics and imitations can have inclusions. Glass typically has gas bubbles. Other synthetics can have any number of internal characteristics.

Find a local gemologist that will look at it for you and give you a no cost or low cost opinion. I used to do free identification all the time when I was in the colored stone business. It helped me hone my skills and was good PR. If he thinks it has promise you can then send it to GIA for a definitive ID.

 

[Agar40]

The stone is on a platinum setting with old emeralds that are dry and needs treatment. The stone is of a good size. See the pictures.

 

[Rockdiamond]

IMO - no way that's a diamond

 

[Texas Leaguer]

Look carefully at the facet junctions. If they are rounded or badly abraded, that would indicate a material much softer than diamond.

Cool looking stone. Seems to have a color change going on in.

 

[kenny]

Thanks for the pics.
I recommend posting these pics on Pricescope's Colored Stones forum. [URL='https://www.pricescope.com/community/forums/colored-stones.11/']https://www.pricescope.com/community/forums/colored-stones.11/[/URL]
This forum, Rocky Talk, is only for diamonds so you may not reach our experts on colored stones that are not diamonds.

Colored Stones Forum regulars are very good at identifying colored gems.

 

[Rockdiamond]

I based my answer on the way the stone looks in the photos.
BUT- the good news is that this is an easy question to answer- pretty much all pawn shops and jewelry stores have diamond testers.

 

[Agar40]

I found two of GIA's articles that describe and give examples that are consistent with the inclusions inside my stone. I also read on Wikipedia the following information: "Fingerprint inclusions in the shape of fingerprints can sometimes be found in diamonds. However such inclusions are rare in diamonds as compared to other stones like rubies. Such inclusions are usually formed during fluid assisted partial healing of fractures already present in stones. For this to take place in diamonds, high temperatures and pressure (HTHP) are required, which is unusual. TILL NOW FEW INCLUSIONS HAVE BEEN REPORTED IN NATURAL BLUE DIAMOND AND COLORLESS DIAMONDS. While this could indicate that diamonds have been HTHP treated, giving the required temperatures for fingerprint inclusions, such is not always the case. The earth may also cause geologically high temperatures, leading to the formation of fingerprint inclusions."

*My stone also has fingerprint inclusions.

*According to the GIA, sulfide, blue color graining, whitish graining and cross-hatched “tatami” strain pattern were discovered inside natural blue diamonds. My stone has all of these inclusions inside. Inside the stone is a phenomenon.
I went and did research on the stone after I learned it cloud be a natural color diamond. Upon my research, I can conclude that there is great possibility that it could be a natural color. Also, it has the RF of a diamond. The stone will go to a lab in Europe for more evaluation. I wanted more opinions on the stone, so I posted on the diamond forum. By the way, I do appreciate all the replies.
Thanks again.

Also, I removed the images because I was told to post them on the colored stones forum instead . However, I attached another image that shows some inclusions.

 

[Dancing Fire]

If this stone is a natural diamond then I'll eat crow for the rest of my life...

 

[Agar40]

Just a comparison...

 

[cflutist]

If it has inclusions, it is likely a natural stone, as synthetics are flawless. The picture makes it hard to tell if it is a diamond though. I have to agree with Kenny on this one and say that it would be highly unlikely that someone cut a FCD that shape.

Not true, I have a Chatham Synthetic Blue and it has inclusions.

 

[diamondenvy1]

If it has inclusions, it is likely a natural stone, as synthetics are flawless. The picture makes it hard to tell if it is a diamond though. I have to agree with Kenny on this one and say that it would be highly unlikely that someone cut a FCD that shape.

Not true, I have a Chatham Synthetic Blue and it has inclusions.

I was referring to gem and diamond alternatives, fakes, if you will - not lab grown or "created" gems and diamonds.

 

[Marlow]

If it has inclusions, it is likely a natural stone, as synthetics are flawless. The picture makes it hard to tell if it is a diamond though. I have to agree with Kenny on this one and say that it would be highly unlikely that someone cut a FCD that shape.

Not true, I have a Chatham Synthetic Blue and it has inclusions.

Agree! Many have metall ( magnetic) inclusion - a magnet could be used for quick examination - natural diamond is not magnetic.

 

[Agar40]

It is not magnetic at all.