You definitely need a GIA report which specifies if it is natural green, or treated as this GREATLY affects the value of green diamonds. Green diamonds also happen to be the hardest I believe for the GIA to distinguish if it is natural or not because radiation is what causes the green color.
That said, very rarely do diamonds of that size have GIA reports because of the cost of the report compared to the value. Honestly, I've only really seen reports for diamonds that small for some very rare red, blues, or violets. I have some fancy colored diamonds that I've bought from very reputable vendors that are more than 3 times that size that neither they nor I have sent because of that. (They also are very well cut and sparkle like crazy.) So honestly, it probably isn't worth the investment ,imo.
But to answer your question, yes I've seen them.I own a 1.74 ct natural fancy light grayish greenish yellow (my e-ring), and a natural 1.51 ct fancy deep yellowish green, and a .4 ct green and a .18ct that I don't have reports on. My mother owns a 3.2 ct natural fancy light Green. It is incredibly beautiful and puts all mine to shame!
Sorry for all the "ands" in the last paragraph above, I was just remembering what I have and didn't edit well! But it also just occurred to me that my .4ct green is in my avatar pic. The color isn't really accurate, but it's the cushion one above the violet round.
Given how tiny it is, a GIA cert would cost you more than you can sell it for.
It is almost certainly natural as green diamonds are always cut before being treated. The color is not even all the way through. Many of those treated black diamonds are actually green diamonds that have been treated until the green is solid all the way through.
You can find larger (but still very small) uncut greens for around $20. But the color on this one is spectacular, so it might turn out to be worth more.
Thank you all for the replies and I did bring it to a couple specialist who from what they could tell said it was untreated and said it was probably worth a couple hundred dollars which if I do get it certified won't be much of a profit I do appreciate all the replies if anyone is interested let me know and thank you all so much
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Hi Everyone!
Pure green is one of the rarest colors in diamonds. Right up there with pure orange.
Yes, I have seen them- but they are very rare!
Far more common are green diamonds with modifiers. ( Fancy Greenish Yellow, etc)
As was pointed out- the green comes from natural radiation, making detection of treated stones far more difficult.
I'd be wary of specialists making claims about a stone being natural without a GIA report.
At this point, GIA is having cutters submit the rough before cutting to give the "natural" label. It's far easier to tell if a rough diamond turned green from natural, or man-made radiation. The naturally irradiated stones don't get burned like man made radiation. If GIA cannot determine which is it, the stone gets the dreaded "Undetermined" label. I've seen stones that would fetch over a hundred grand going for less than $20k due to the Undetermined label. A killer for the cutter.....
There are also cases of cutters leaving a small patch of rough skin on the stone to prove to GIA that the stone is naturally green.