You can get these gems by doing “Party Quests”, it will take a couple of minutes at best. Party Quests are obtainable by going to Receptionist Liam at Klaipeda. To enable these quests/npc: talk first to Mercenary Post Manager Rota (north klaipeda, close to this npc) to make the npc active for the first time, then go to the map “Veja Ravine” and do the blue quests on that map, the npc has random quests based on what blue quests you cleared in the game.
The fastest quests are“The Big Accident” and “The Disappearance”. If you did not get either, leave the party and remake it again, then talk to the npc again to get another quest, be sure to have completed the blue quests on the map “Veja Ravine” or he won’t have “The Disappearance” as a possible random quest, that quest is 1 minute long.
When the quests are completed, it will give a Sparkly Cube that contains 3/5 of the same kinds of random gems. You can re-roll it for another gain with 50.000 silver. Token users have the benefit of re-rolling a total of two times.