Advanced Black-Orange Hawkeye Crystal

Advanced Black-Orange Hawkeye Crystal is a level 50 artifact color crystal that can be added to a character's weapon.

Source
Advanced Black-Orange Hawkeye Crystals can be obtained through crafting or as an operation drop.

Crafting
Advanced Black-Orange Hawkeye Crystals can be crafted by Artificers with a skill of 400.
 * Artifice materials

The schematic can be obtained by reverse engineering an Advanced Black-Orange Hawkeye Crystal.

Operation drop
Advanced Black-Orange Hawkeye Crystals can be obtained from operation bosses.
 * Operations
 * Terror from Beyond