The
jeweler says that the stone is a natural carbonado, and seems
reputable; that said, I'd like some degree of confirmation that this IS
indeed a carbonado. I asked about getting a certification for the
stone, and the jeweler was fine with it, but said that it would require
them to extract the stone and then re-make the ring.
As
it's a one-of-a-kind piece, I'm a bit hesitant to do that in case it
alters what we love about the design. Are there any ways, working with
the jeweler or an outside party before purchase, to confirm the
authenticity of the diamond without removing it from the ring?
A: It
may very well be a Carbonado, but what gives the jeweler the confidence
that it is one? When they bought it they would have to have been
reassured that they were getting the real deal.
The
International Gem Society tells us that while most black diamonds on
the market today are either superheated or irradiated to an almost black
color, natural black diamonds do exist, though they are extremely
rare.
Black diamonds are as a rule not more expensive than colorless diamonds.
For reference see this 3 carat oval from one of the world's foremost experts on fancy color diamonds. https://www.leibish.com/black-diamonds/fancy-black-oval-31234
As you can see the above site provides a GIA certificate with their diamonds.
Without
one it is better to assume that it is a treated stone. Just check
amazon.com and see how much black (irradiated) diamonds go for.
Some tests can not be done , such as specific
gravity comparison of the weight of the isolated stone to the same
volume of water. This test only proves it is a diamond, not whether it
is a natural Carbonado,
However it's up
to you. What is the significance of knowing that the diamond is what
it's purported to be? Satisfaction, yes. But insurance and resale value
could be factors for you. Will the in-house certification cut it for
those? Maybe. But GIA holds a lot more authority.
Q: This
is really helpful, thanks for the feedback. This particular ring is
only about $2.2k, and the center stone is 1 carat, so that's less than
the cost of most colorless diamonds I've seen. As far as I can tell,
they have confidence in the authenticity on the word of a sourcer that
they trust.
In your opinion, it sounds like I should go with the certification?
A: Without certification you may as well buy an irradiated stone. This is what certification is for. So you can be certain.
Q: Thanks so much, that makes complete sense.
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