Gemstone Powder

Mithril Powder is a collectable (non-item) that is used to upgrade Tier 6 and 7 Heart of the Mountain perks. It can be obtained from mining Gemstones, opening chests in the Crystal Hollows, completing Crystal Hollows Commissions. The Heart of the Mountain perk, Sky Mall, one of its buff grants a chance to earn 15% extra powder for an entire SkyBlock day.