Community term: Emerald (Karambit-only)
Doppler knives use a phase-based finish system — each instance is one of four phases (P1, P2, P3, P4) or one of the three rare special phases: Sapphire, Ruby, and Emerald (Karambit only). Phase is determined at unbox time. Emerald Karambits represent under 1% of all Doppler Karambit drops — the rarest phase in the rarest finish on the most iconic knife model.