Gemstones are one of several Artifact currencies that can be found within the Underworld. They can be used to commission upgrades at the House Contractor. It's currently the bottom tier artifact in the "trade up" tree.
||'...Mortals cherish these stones of many brilliant colors, going to lengths to excavate them from the earth; to steal them, to be blunt, from the rightful domain of Master Hades. The Master also values them, for light exists in limited supply down here, and light refracted through a gemstone's facets is most valuable of all. The merest glimpse of such a dazzling display can spur a loathsome shade to action, in the Master's name; and thus has Master Hades found within his realm a naturally-occurring motivator for whatever must be done. And as for mortals who would risk themselves to steal from the earth -- they all tend to forget that, in the span of just a few short years, they shall likely find themselves right here, among the Master's riches that they sought.'
Gemstones can be received as a room clear reward, as a reward for opening Infernal Troves, from the Fated List of Minor Prophecies, or in trades with the Wretched Broker.
Fishing is also a way of obtaining Gemstones.
With the Brilliant Gemstones upgrade from the House Contractor, Gemstones will also drop 20 when collected from a room reward.
Trade-up prices at Wretched broker[edit | edit source]