Crystals and Mica

Obtaining Litherite

The first crystal, Litherite, can easily be obtained by combining emeralds, ender pearls and quartz. This recipe is just a regular crafting recipe and can be viewed in JEI. There are several recipes associated with crafting litherite and you'll most likely want to aim for the one that uses 4 ender pearls, and 4 quartz in order to get the most out of your emeralds.

Crystals

Eriodium, Kyronite, Pladium, Ionite and Aethium

OneAll of thethese firstcrystals things you are probably going to want to mine is more Crystals. This happens to also behave the waysame method to obtain them and that is through the Crystal Miner program in the Void Miner. In order to get the next tier of crystal.crystal To mine Erodium crystalthough you will need ato tier 1 mine or above. Each tier crystal is obtained byhave the previous tier miner.miner Theto onlymine crystalsthem thatwith.

have different requirements for mining are

Nanorite and Xerothium

These two crystals which,are obtained in additionthe same way as the crystals above(through mining in the void Miner) the one exception being that your miner needs to thebe previous tier miner, you'll need to have that minerlocated in the End dimension. 

Mica

You can obtain mica using the Resource Miner(Multi Miners->Resource Miner) or the Rocky Resource Miner(Resource Miners->Rocky Resource) programs. Mica does not have a lens focus which means there is no lens type that will improve its mining rates. The best way to obtain it is using the Rocky Resource Miner program.