top ancient steven universe theories:

• pearl was an aristocrat and/or got captured by the cgs and ended up being forced to join
  
• garnet had two gems because she absorbed the souls of her dead parents(???) (we didnt know how gems were made and giant woman hadnt come out yet ok)
• the entire gem species were warriors who went around defending planets and helping people (hell this wasnt even a theory we just assumed this to be true at one point)
• and of course, that iconic classic, onion is yellow diamond / her son bc he doesnt have ears you see,