The Black Gemstone (also known as Black Rock in the SNES/PS version) is an accessory in Chrono Trigger. It can be equipped on Marle, Lucca or Magus. When it is equipped and all three are in the same party, they can use the triple tech Dark Eternal.
- Found at: In the city of Kajar in the Kingdom of Zeal in 12,000 BC.
- To obtain it: You must play Nu's book game to open the door next to his store, revealing the secret room where the Black Gemstone is hidden inside a Poyozo Doll.
|Chrono Trigger Accessories|
|Headband | Ribbon | Power Glove | Guardian Bangle | Magic Scarf | Schala's Amulet | Speed Ring | Acuity Ring | Power Ring | Magic Ring | Barrier Ring | Silver Earring | Golden Earring | Silver Stud | Golden Stud | Sight Scope | Alluring Top | Rage Band | Wrath Band | Third Eye | Workman's Wallet | Green Dream | Berserker Ring | Power Scarf | Speed Belt | Black Gemstone | Blue Gemstone | Silver Gemstone | White Gemstone | Golden Gemstone | Hero's Badge | Muscle Ring | Flea Bustier | Magic Crest | Power Crest | Sunglasses | Prism Spectacles | Valor Crest | Champion's Badge | Dragon's Tear | Nu Arcana | Uranian Mirror | Pontic Mirror | Promethean Mirror | Hadean Mirror | Aresian Mirror|