Herbin recently released their latest color in the ' les encres 1798' series: Kyanite du Népal. I pre-ordered this ink about six weeks ago. It looked really spectacular in the annoucement and I was anxious to try it out this week when it arrived. The color is a bright blue (that leans a bit towards teal in my opinion) and has silver particles. Clearly visible in the bottle, much less on the paper when writing. Not a real surprise, it's the same with the other colors in this series too.
In practice, the color is a lot less spectacular. I like the color, not for office use (too bright, too shiny) but for (not too long) personal communication or greeting cards it is a very nice color to use from time to time.
Like any ink in this series it is very well behaved. Smooth, a bit wet, no feathering, neglilible show-through, and a very nice shading. Drying time was surprisingly fast (15 seconds) and water resistance very low. Shimmer is clearly visible with a cotton swab, much less so in even broad or stub nibs (even after turning the bottle upside down a few times to distribute the silver particles through the ink better).
Because it is a bright, not too dark blue with a hint of teal I compared the color with Montblanc's Miles Davis (much lighter, much more blue), Iroshizuku's Ku-jaku (a lot greener) and Iroshizuku's Tsuki-yo (much darker). None of these colors come really close.
All in all it is a very nice ink and a unique color. Great to use for cards and short notes.
Written on Original Crown Mill Vellum paper