Turquoise is a medium blue-green.
The large swabs of this ink are beautiful, great depth and sheen.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Dry time: 20 seconds
Water resistance: Low
Show through: Medium
On 20 pound copy paper the ink behaved well, no issues that I noticed.
I used a Pelikan 400N then switched to a medium Pelikan M400 White Tortoise on Tomoe River paper. The ink had a nice wet flow.
Overall, this ink behaves exactly like Robert Oster Marine, it just has a little less green in it. I don't think you can go wrong with either Marine or Turquoise-they are both beautiful. Give it a try, you might love it.
Disclaimer: I purchased this ink myself, and all photos and opinions are my own. There are no affiliate links on this page.