Blue Solid Crystal

Blue Solid Crystal is a Grade 4 premium color crystal crafting material.

Source
Blue Solid Crystals can be obtained through the gathering crew skill Archaeology. It can be harvested from Blue Solid Crystal Formations on, which requires 185 Archaeology, or from level 33-40 Archaeology missions. There is also a chance to obtain Blue Solid Crystals from reverse engineering the appropriate level and type of gear.

Uses
Blue Solid Crystals are used in several Artifice and Synthweaving schematics.