Turquoise is the newest addition to the Graf von Faber-Castell family of inks (which is now consists of 13 vibrant colors).
Graf von Faber-Castell Turquoise is bright but not very saturated aquamarine color. Closer to the true aquamarine rather that to the generic light blue of many other turquoise inks.
Graf von Faber-Castell ink cartridges are Standard International Short cartridges. They can be used in all compatible fountain pens including Standard International compatible pens of other brands. Each cartridge is 38 mm long (1.5”) and contains about 0.8 ml of ink.