Board Thread:Fun and Games/@comment-37146126-20181225192401/@comment-31394942-20190118201512

The second is the gemstone of Hessonite from Save the Light, and the other three are all other varieties of garnet.

Here are some guesses:

1: Demantoid. (Possibly Tsavorite or Uvarovite.)

3: Pyrope.

4: Melanite.