Ruby (Subnautica)

The Aluminum Oxide Crystal is a raw material commonly found throughout the Grand Reef and the Sea Treader's Path. According to its description, it is used for heat and electricity conduction.

Appearance
The Aluminum Oxide seen in game takes the form of Corundum, appearing as a white rock with four short bright red spikes, emitting a small amount of light.

Trivia

 * Aluminum Oxide Crystals may be rubies due to the partial red coloration, as since Aluminum Oxide Crystals in-game comes in the form of Corundum, which are classified as gemstones.