The Arbiter of Knives owned a Factory of Crystal.
She used it to visit 21st century New York City in her attempt to steal the Book of Books from the Totality; as she walked the streets, it appeared as a crystal orb hovering beside her. (PROSE: Rachel Survived) She used it again to travel to Vo'lach Prime to meet Sergeant-Instructor Littlejohn, and from there to Gendar before finally returning home to the 10,000 Dawns. (PROSE: The Gendar Conspiracy)