Black Gem

Black Gem (黒い宝石) is a type of fungal growth native to the New World.

Description
On his visits to Arwintar, Pe Riyuro would bring this item for Jircniv Rune Farlord El Nix.

Appearance
These mushrooms are known to be fragrant and plump.

Abilities
While the overall benefits of Black Gem are unknown, though it is regarded as a luxury item.

Trivia

 * Judging by their description, its possible they are similar to truffles which are also known as black diamonds.