Crystallite Ingot

«Crystallite Ingot» is an item in Sword Art Online. It is found in the Frost Dragon's nest and the end result of the said dragon's diet of crystals--this crystal is its solid excrement.

Background
The Crystallite Ingot is only found in the Frost Dragon's nest in the West Mountain of the 55th Floor after starting a quest in the nearby village, and can only be harvested with the presence of a nearby master smith.

Warmth of the Heart
After Kirito's request of a new sword and breaking one of Lisbeth's masterpiece swords, Lisbeth informs Kirito of a dungeon on the 55th Floor about a dragon that produces crystals. The two journey to the West Mountin dungeon and face the crystal-producing Frost Dragon. Before Kirito is able to finish off the dragon, Lisbeth comes out of her hiding place and the dragon uses its blizzard attack upon sensing another player. Lisbeth falls into the dragon's nest, and Kirito goes to break her fall. Kirito and Lisbeth, without a way out of the nest, spend the night there.

In the morning, Lisbeth sees Kirito digging in the ground, and produces the Crystallite Ingot, as well as revealing that it is actually the dragon's solid excrement. The dragon returns to its nest, and Kirito and Lisbeth escape from the nest by Kirito picking up Lisbeth and hitching a ride on the dragon by hanging onto its tail.

Back in Lindas, Lisbeth takes the Crystallite Ingot and prepares to forge it. After preparing herself in the event that she impresses Kirito with the new sword and thus confessing to him, Lisbeth begins to forge and smith the ingot into a sword. After a few hits, the ingot turns red and becomes the Dark Repulser.