Bi-Color Gems for Old FATEs

[Toutatis]

There’s the market board.
You can also send retainers to gather mats while you do something else. At high level with decent gear (at lvl 90, 573 gear for max returns at all levels on battle retainers and 3420 perception for mining/botany - you need a lot less for the old mats) they should be able to bring you back 50 of each older mat and 15 of lvl 90 mats save for the rare mats which come in lesser quantities.