What is concrete steven universe?

Concrete Steven Universe is a type of fan theory that suggests that Steven is a concrete gem. This theory is based on the idea that Steven's powers and abilities derive from the concrete which makes up his physical body. According to this theory, Steven's mother, Rose Quartz, created him by using concrete obtained from the Crystal Temple.

The theory suggests that Steven's gemstone is not a traditional gem, but rather a manifestation of the concrete within his body. This would explain why Steven is able to heal and create physical constructs in ways that other gems cannot. Concrete Steven Universe is a popular fan theory within the Steven Universe fandom, and is often discussed in online forums and social media. While this theory is not officially endorsed by the show's creators, it has gained a significant following among fans of the series.