Personal Quartz Node (Home Instance)
Quartz is used to craft weapons, armor and trinkets with Celestial stats (an all-stats bonus similar to Runes of Divinity). Raw Quartz is tradable, so even players that miss out on BotFW can still obtain it via the TP, but in order to use it for crafting, you will need to “refine” the quartz by bringing it to a Place of Power. This takes 25 Quartz Crystals, and can only be done once per day per account.
I honestly don’t know whether Celestial items will have strong enough demand to make Quartz mining profitable, given that most players prefer to stack their stats towards damage via Berserker or Rampager stats.