From Starbounder - Starbound Wiki
Removed: No Longer Available
Crystalline was removed from the game files, and is no longer obtainable.
Crystalline used to be a mini-biome that could only be found on volcanic planets in which the grass and trees were made of crystals. As of Version 1.2.2, the Crystalline mini-biome has been replaced by the geode mini-biome. While objects related to the Crystalline mini-biome remain in the game, the files defining the biome itself have been removed.
Note that the Crystalline Microformer terraforms sections of a world into the Geode mini-biome.
Biome Specific Objects