When I think "Jade" green, I think more along the lines of this color:
This Diamine ink is not that color, but it is indeed fabulous. (Wouldn't an ink that color be great too???)
A Google Image search shows that the actual Jade stone varies wildly in color, and a few examples do exhibit the color of this ink. Having learned this, I can't quite say that this ink has an official misnomer, but it could be confusing. To me "Jade Green" is "lime" green, that borders on chartreuse depending on the lighting.
That said, I still love this ink, and now that I know to research examples rather than buy ink based on names, I did purchase this ink because it looked like lime green.
The color, again, can best be described as a lime green. It is very bright, but stops just short of neon. This color would likely be considered too "loud", and perhaps even obnoxious by more conservative fountain pen users. If you have trouble reading bright or light inks, this would not be a good choice for you. I am posting both photographs and a scan, but the color in person seems much more like what the photographs show. The scan is too light and too yellow, and adjusting it did no favors. This ink does lean a little yellow, and thus looks chartreuse in some lighting. It is not an annoyingly obvious aspect of this ink, but it is there.
This ink is about as well behaved as they come. Great flow, no feathering, and no bleed-through. The dry time seems a bit lengthy in my test, but I don't notice it when writing normally (like you do with say, Noodler's Black Swan in a flex nib). There is noticeable shading using this Safari B nib, and it really adds a nice touch to the overall appearance of this ink on the page. I suspect that in a dry, fine nib, that this color may be too light to read easily.
This ink is NOT waterproof, but makes no claims to be.
Since this ink is so light and bright, I decided to do a "highlighter" test with it, where I just scribbled it over a black Sharpie Pen sample. I think I could work, especially if loaded into an appropriate tool.
(Scan of written review)
I ordered this ink as a sample from The Goulet Pen Company, and I wholeheartedly intend to buy a full bottle. I love this ink, and now I am craving some Key Lime pie!
Happy 2011 readers, and may your writing adventures be fun!