Petrosapien

Petrosapiens are a race of crystalline humanoids from the planet Petropia.

Anatomy
Petrosapiens are silicon-based lifeforms slightly taller than humans, with skin made from a blueish-green diamond-like material. They have four-fingered hands, and toeless feet. Male Petrosapiens have a spike on the back of their head and two to six additional ones on their back, while females do not.

There are many different races of Petrosapiens, including Surface Petrosapiens and Subsapiens. Each one has their gem-like colors and shapes.

Surface Petrosapiens are shown to be lean and thin, with square bodies and limbs. Their sharp edges are chiselled like carefully crafted sculptures. Subsapiens are much larger and have wide bodies with thick limbs, with some having crystalline growths on their foreheads resembling pompadours.

Powers/Abilities
While jewel-like in appearance, Petrosapiens have crystalline bodies that make them incredibly resistant to most physical attacks. They themselves are physically enhanced due to their bodies.

Petrosapiens are able to shoot crystalline shards at rapid speed and alter their bodies into crude tools, including blades that cut through most materials.

Petrosapiens can manifest large, almost mountainous formations from either their projectiles, walls, or the ground itself and manipulate them under their control. They can even generate and retract these formations, such as giant spikes, from their own bodies. Combined with their increased strength, a Petrosapien's shredding appendages can be especially devastating.

Petrosapiens can regenerate their injuries to a certain extant. They can also extend their arms to superhuman lengths.

Being living prisms, Petrosapiens can refract, absorb, and redirect light and beam-based weaponry, channeling them through their bodies and projecting them back at their source as beams blasts.

Since Petrosapiens are made out of organic crystals, they are immune to aging. Therefore, they are impervious to the time rays of a Chronosapien or a Chronian, as diamonds do not age.

Due to the alterations Kevin Levin has made to the Antitrix, Crystalfist is more powerful than ordinary Petrosapiens. He can also shape any crystals he generates into anything he desires, such as tentacles.

Omni-Enhanced Petrosapiens can channel absorbed energy into their swords, which can be converted into other energy weapons. They can also shoot Omni-Enhanced energy out of their arms, and have their natural durability increased thanks to their rock-like armor.

Omni-Kix Petrosapiens can transfer their consciousness through crystal, allowing them to exit their bodies, teleport via reforming from said crystal, and use their regular body as decoys for opponents. Also, they can equip katar-like blades on each of their forearms that double as shields, and have their natural durability increased thanks to their Omni-Kix armor.

Weakness
Petrosapiens are particularly vulnerable to sonic vibrations. While a stereo blast might cause them to splinter, certain ultra-high-pitched sound waves can cause them to shatter, including a Loboan's sonic howls and an Evolved Sonorosian's Sonic Disks.

The shards on a male Petrosapien's back can leave them stuck to a wall or on other surfaces that they get knocked into. Females do no have this weakness.

Since their bodies are made of diamond, Petrosapiens can sink in water.

There is limited extent in how much damage a Petrosapien's body can take before cracking or shattering. Once they break completely, no glue in this galaxy or the next can put a Petrosapien back together again.

Society
The Surface Petrosapiens have built an advanced space-faring civilization. The Subsapiens, meanwhile, fight in violent wars for territory, unaware that they are being manipulated by the Antrosapiens.

Original Continuity
The Petrosapien race originally dwelled beneath Petropia's crystal surface in underground cities. After several centuries of warfare, a giant hole was accidentally ripped in the surface of Petropia, revealing a universe far beyond Petropia's heretofore self-contained existence.

With the inadvertent discovery of space, Petrosapiens began to stabilize their civilization and they began to explore the surface of Petropia and the rest of the universe.

Due to the infighting between the various races on Petropia, they made it easy for the Chimera Sui Generis known as Vilgax to manipulate them long enough to destroy Petropia energy from the Petropia Back-up Crystal, which was sold to him by a young Tetrax Shard.

Years after Petropia's destruction, Tetrax learned from exploring the planet's remains what the true nature of the Back-up Crystal was. After stealing the crystal back from Vilgax, Tetraxx made his way to Earth and gave it to Sugilite, the Crystalsapien guardian of Petropia. Arriving to Petropia, Sugilite used his powers to restore the planet itself before being nearly killed by Vilgax.

Using both the Back-up Crystal and his Petrosapien form Diamondhead, Ben Tennyson was able to finish Sugilite's mission and revived the Petrosapiens. As gratitude for saving his life, Sugilite allowed the Omnitrix to sample his DNA, restoring the destroyed transformation Chromastone.

Reboot Continuity
In this timeline, Petropia was never destroyed by Vilgax because he never arrived on the planet to begin with. As such, Petropia remains intact and the Petrosapiens are thriving.

Long ago, the Surface Petrosapiens split from their Subsapien ancestors and relocated to the surface. Meanwhile, the Subsapiens remained underground in the deep substrata of Petropia. After the two factions became exhausted by their endless civil war, the Antrosapiens launched a surprise sonic attack. The Subsapiens begrudgingly allied themselves with their surface cousins to survive the greatest threat to their species. They constructed a war machine capable of absorbing the Antrosapiens' sonic attacks and redirecting them as a powerful energy blast, successfully dealing a devastating blow to the Antrosapiens. Petropia would later become under siege by a Fulmini invasion party, leading to the Surface Petrosapiens, the Subsapiens, and the Antrosapiens to join forces and protect their planet. The Fulmini were quickly driven off, and all three factions were finally at peace. Wanting to take a break after their war against the Fulmini, the Petrosapiens went to Appoplexia and used crystal constructs to keep the Appoplexians entertained.

Omnitrix Transformation
The Omnitrix's Petrosapien representative is named Diamondhead, who first appeared in the original series episode "And Then There Were 10". Diamondhead has appeared in every series.

The reboot version of Kevin 11 has a mutant hybrid equivalent of Diamondhead named Crystalfist, who first appeared in the episode "Franken-Fight".

Diamondhead has also been used by the Prime Timeline Gwen and Kevin, the "What-If" Gwen 10, Ben 10,000, Race Against Time Ben, Albedo, Vilgax's Bioid army, Ultimate Ben, the canon Gwen 10, and Mad Ben.

Etymology
Petrosapien comes from petra (meaning rock) and sapien (meaning intelligent being).