Shaving

Shaving is a method of torture invented by the deranged Fluorite in Era 1. Due to it's brutality, its use was banded by the Great Diamond Authority.

Method (Quoted from Fluorite's Journal)
To start, the torturer must destroy the form of a uncooperative victim. Then take a blade and run it along a facet of the victim's gemstone at a 35 degree angle, moving slowly. This should shave a thin slice off of the victim's gemstone, causing extreme agony. Repeat until desired pain is reached. Wait for the victim to reconstitute their form and repeat questioning. If victim still refuses, repeat process. After information is received, destroy their form and repeat steps until gemstone is nonfunctional.

Note: Method is more useful when prime victims loved ones are additionally restrained. Prime victim more willing to break when other gemstones are shaved.