Prototyp is correct. This Synth requires 2 black tiger fangs, not 1. just had 1 one made today. So it should read...
Recipe:
Leathercraft (87)
Crystal: Earth
Yield: 1
* Black Tiger Fang x2
* Coeurl Whisker x1
* Karakul Leather x1
* Lizard Skin x1
* Mamool Ja Helmet x1
* Marid Hair x1