Looks like my Sapphire Blue PRs. Mine lay beige eggs. Sapphire Gems/blues don't breed true. My rooster's parents are both Sapphires, and he looks like a barred rock. His brood mate hen looks like a Sapphire Blue, but with a crest. Last pic is of the Sapphire Blue, purchased from feed store.
So these chicks would be half Sapphire Gem? Some of them could be, if they have a single comb. Though I’m not exactly sure what that cross would look like…