Board Thread:General Discussion/@comment-26481069-20150621221235/@comment-28584561-20150621224036

Experimentation. They wanted to simply see if it's possible to forcibly fuse broken gems. Maybe they used broken shards before using full gems. If it works on shards, it probably will work on unshattered gems. They probably used Crystal Gems shard as a form of punishment for the rebellion and homeworld will use Gems cultured in kindergartens next. But that's just my take on it. ..