From Dark and Darker Wiki
Mystical Gem
A beautiful jewel that shines mysteriously. There are elaborate parts that seem to fit somewhere.
Utility
Utilities are single or multiple-use items that can be used during combat or to complete a variety of tasks.
Information
You can get Mystical Gem by killing Cave Troll
Usage
Mystical Gem opens Stone Door that leads to Mystical Gem Room in Goblin Cave#HR map. There is a Treasure Hoard, 2 random large chests and 2 random trinket drops in the room.
Drop Table
Drops from Cave Troll, chance is not known
DropTable:Mystical Gem 6
History