A Petrosapien can sapeshift their body parts that are made of this material (mostly their arms) and can shoot them from their bodies as projectiles. These crystals can also be formed by a Petrosapien from any solid surface in a variety of shapes and can be telekinetically be controlled by the individual at will, making it a highly renewable substance.
Due to their crystalline structure, the crystals are able to reflect light and absorb energy-based attacks. If the energy channels through the crystals of a Petrosapien, the energy can be projected back to the source by the will of that individual.
The crystals are virtually invulnerable to most physical attacks, but are vulnerable to sonic vibrations. While a stereo blast might cause them to splinter, certain ultra-high-pitched sound waves can cause them to completely shatter. A Petrosapien exposed to these sound waves would most likely become unconscious or dead as a result.