You can combine your Fragments, Gems and Chests from "[Jeweller] Juel" NPC to get better ones.
But remember, the success rate of this process is 50%. Good luck!
Shadow Piece has been activated in Gem Craft!
With Shadow Piece, all rates become 100%!
Updated for Zenith!
Chest Craft
30x Red Treasure Chest + 20x
Green Treasure Chest + 1x
Gold Coin =
%50 RATE
1x
Blue Treasure Chest
Fragment Craft
30x Fragment of Arrogance + 20x
Fragment of Gluttony Bar + 10x
Fragment of Rage + 1x
Gold Coin =
%50 RATE
1x
Random Lechery/Jealousy/Avarice
Gem Craft
30x Black Gem + 20x
Green Gem + 10x
Blue Gem + 1x
Gold Coin =
%50 RATE
1x
Random Red/Silvery