Hi,is this paraiba tourmaline of approprite color.It doesn’t mention if treated or not.The colors i see online seem more brighter.
ICA is reputable. The color can vary some and Paraiba is determined by its copper content. Several topics on paraiba here talk about the specifics on copper.
Cheers!
-Troy
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thank you for ur .Just hoping it untreated.
Within the trade, at least for members within the United States, we want to see a report from GIA or AGL verifying that the tourmaline is copper-bearing. Outside of the United States GIA is still great, but other labs such as GRS and Gubelin are strong as well.
As far as gem labs grading high-end colored stones, American Gemological Laboratories (AGL) is generally considered the gold standard.
If you’re ever planning on selling and you want top dollar for your stone, one of these reports will be mandatory for most educated buyers. If you’re not planning on selling, then the report you have now is probably fine.
Last thing to note, it is highly unusual for a gem lab to not have a line item labeled “Treatments” where they will call out whether or not the stone is treated and if it is by what means.
Hope this helps.
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Thank you.i do plan on getting a gubelin report.And i got two more emeralds but the color is sort of wierd.its almost like paraiba.
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Treatment? Your piece seems to me to have a slight gray “mask”… which a heat treatment removes along with making brighter colors. HEAT… is an acceptable part of preparing gemstone for sale… and many do not list that as a “treatment”. My guess is that your stone has not been heated… as the colors are a bit muted… It is interesting in that your ICA certification would not change if it were to be heated and become more transparent and brighter. Heat is a can of worms and many may log in with additional views.
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I guess heat in these tourmalines are a accepted treatment.May be i should get it heated,though i have no idea how and where its done.Thank you .
Not sure it is necessary to heat treat the stone. Although, @Dion may have better insight on this.
Can a low heat treatment be detected by the lab, as is the case for a few other stone species?
An interesting article I just found: Paraiba Tourmaline - Read more about this interesting stone.
Also, this website: Exquisite Paraiba Tourmaline Collection | Paraiba International has some interesting stones available that are being claimed as Paraiba. I’m not convinced… because some of the colors are “too” green from what I have seen so far, but Paraiba is still a new stone to me.
So anything is possible… 
-Cheers!
Troy
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