Shadowgems are Shadowrealm’s premium currency. They can be bought, but the part worth documenting is that they can also be earned purely through play, and that there is a player-run market where gold and gems trade directly. Nothing gems buy is unavailable to a player who never spends money.
The through-line is that gems reward patience rather than payment. Every one of those sources is time-based, so a player who logs in regularly for a month accumulates a meaningful balance without ever opening a wallet.
The gem shop carries 51 distinct items. They fall into a few honest categories: instant restoratives and energy refills, gear crates, cosmetic items, convenience unlocks such as extra marketplace slots or a stronghold build queue slot, and respecs for the talent and Ascendancy trees.
Gear rerolls also cost gems, which is where most active players spend the bulk of theirs: rerolling the rolled stats on a good piece of equipment is the main way to turn a lucky drop into a genuinely best-in-slot item.
Gems can be converted to gold directly at a rate of 0.98, capped at 500 gems per day. The cap is the important part: it exists so the conversion is a steady trickle rather than a lever anyone can pull to flood the economy in one afternoon.
The other direction runs through the player gem market, where players post gems for gold and gold for gems and the price is whatever the two sides agree on. That market is where the real exchange rate lives, and it moves with what players are doing, so it is worth checking against the fixed conversion rate before using either.