Caran d'Ache Turquoise Green Ink

This ink came before Caran d'Ache's Earth series and you may recognize the bottle from J. Herbin's modern line up. I don't know who made the ink but perhaps we can assume Caran d'Ache had J. Herbin making them? The Turquoise Green is an exquisite shader - just the kind of color I love. Another disappointment that it's discontinued. My favorite and closest match so far is Toucan Aqua, which I have run out of as well. Le sigh.