Petrosapien

A Petrospaien is a species of silicon-based lifeforms from the planet Petropia in the Ben 10 universe, but now exists in real life. Petrosapiens are made of a green/blue diamond-like material. They are a little taller than humans. They have four digits on their hands and none on their feet. Male Petrosapiens have a spike on the back of their semi-cubic head and two to six on their back; females don't.