Another mechanism can be used to corrupt gems, known as Lapidary Lens. This contraption can be accessed in the Doryani’s Institute incursion room found in the Temple of Alzoatl. The room can be accessed by upgrading a Department of Thaumaturgy, an upgraded version of the Gemcutter’s Works...
Upgrade Incursion rooms to Tier 3 (0/200) 29. Sanctified Scarabs II(75) Complete 75 Rare Maps with at least 4 scarabs applied while the Maps have at least 80% Item Quantity and are at least Tier 16. 30. Arduous Atlas(4000) Complete maps with a total of 4,000 explicit modifiers. ...