Board Thread:General Discussion/@comment-26342283-20150426230124/@comment-26697298-20150715084633

for a human to be made the baby must have DNA from both the mother and father but all of Gems' DNA is in their gemstone, so for Rose to pass on any DNA she needed to give Steven her gemstone. But Steven is half human so he would only need to pass on his DNA like a human would, making the baby fully human. (who knows what would happen if he wanted to have a child with a gem)