Cruxite

A long cylinder extracted from the Cruxtruder, first seen HS 2080 (here). It can be used in conjunction with the Alchemiter to create special objects and can be carved by the Totem Lathe to change what kind of item it creates. A carved Cruxite Dowel was used to create a Cruxite Artifact for each of the Kids. Its extraction released the Kernelsprite and began the countdown towards the Meteor impact. Many of these Dowels can be extracted, but only the first Dowel releases the Kernelsprite and initiates the countdown.

The color of the cruxite seen so far corresponds to a player's associated color: Blue for John Egbert, purple for Rose Lalonde, red for Dave Strider, green for Jade Harley, gray for Karkat Vantas, mustard for Sollux Captor, and brown for Tavros Nitram. Jane's cruxite is also blue, however her's an John's shade of blue have been replaced in respect to their typing colors.

Kanaya and Eridan are shown making a HS 4946 (wand) with black cruxite. This was most likely cruxite found in the veil, unrelated to a specific player.

Trivia

 * The Consorts of the Land of Wind and Shade think cruxite is very useless.