Early game you wont find yourself needing these and might think they are useless BUT after level 650 you will need TONS of these for elemental sets and they will sell out instantly in world auction. Make sure you save these and bid on them when you have some extra garnets!

These are very important for raising stats and CP,  you will need 21 per set.

these can be aquired for diamonds or events, they will greatly raise CP and stats at higher + levels but at lower + levels they wont help much

Early game these arent good for much except for blood castle and Icaria same as creation jewel but after a certain level, you will need tons of these for everything. make sure you save a couple hundred.

These are used for upgrading equipment + levels, they can get very expensive at higher + levels.

These are used to increase XP, save them for Kundun seal or use on saturday if you're swimming in these.

These are used for upgrading Wings and Accessories, very good for raising CP and stats.

These are used for buying flags and flag refinement materials.

These are acquired through convoy and other chrysos events, the best use of these is for buying star rune, pattern of spirit, and flag awakening stones if you already have materials for lvl 2 and lvl 3 awakening.