Gemstone Crystals

 are items that can be obtained by completing quests around the Crystal Hollows. The Crystals aren't actual items, but rather achievements that can be tracked in the Heart of the Mountain menu. To get the rewards from the Crystal Nucleus the player needs to find and place five Crystals: Jade, Amber, Amethyst, Sapphire, and Topaz. The two other Crystals, Ruby and Jasper, have no known use. All the Crystals are obtained in a different way. The can point to the locations of the Crystals.

Jade
The Jade Crystal is obtained in by finding 4 Scavenged Items with a in the Mines of Divan. After giving the 4 items to their respective Keepers, the Crystal can be picked obtained.

Amber
The Amber Crystal is obtained from the Goblin Queen's Den in the Goblin Holdout.

In order to obtain it, the player must get the King's Scent effect, which is obtained from after giving him 3 s of the same color.

After obtaining the King's Scent effect, the Queen's Den can be entered to obtain the Crystal. This effect lasts for 20 minutes, but it can be used multiple times to get the crystal. Entering water will remove the effect.

Amethyst
The Amethyst Crystal is obtained from entering the Jungle Temple by giving a a  and completing the parkour.

Sapphire
The Sapphire Crystal is obtained by giving the 6 different (obtained from loot chests in the Precursor Remnants or from killing s) to  in the Lost Precursor City. After giving the parts to him, he will repair the Automaton Prime, and a door will open which reveals the crystal.

Topaz
The Topaz Crystal is obtained after defeating Bal, located in Khazad-dûm in the Magma Fields.

After defeating the boss, the Crystal will spawn nearby.

Jasper
Can be obtained by killing in the Fairy Grotto, or by looting chests in the Fairy Grotto.