Information to keep you on track:

The Diamond Authority

Name: Ash
Type: Blue Diamond

Name: Twilight
Type: Pink Diamond

Name: RSN
Type: Green Diamond

Pearls

Name: Sharron
Type: Blue Pearl
Gem placement: One of his eyes
Diamond leader: Blue

Name: Hime
Type: White Pearl
Gem placement:
Diamond leader: None

Blue Diamond Crew

Name: Gabriel
Type: Amethyst
Gem placement: Right palm

Name: Leo
Type: Sapphire
Gem placement: Left Hand 

Name: Tsuki
Type: Garnet
Gem placement: Tail end

Name: Crimson
Type: Ruby
Gem placement: Center back

Name: Jamie
Type: Jasper
Gem placement: Right leg

Name: Puppet
Type: Bismuth
Gem placement: Forehead

Name: James
Type: Peridot
Gem placement: forehead

Pink Diamond Crew

Name: Berry
Type: Pink Sapphire
Gem placement: Right Cheek

Name: Kitty
Type: Amethyst
Gem placement: Chest

Name: Atsushi
Type: Sardonyx

Name: Yuto
Type: Star Sapphire

Name: Takashi
Type: Dark Aquamarine

Green Diamond Crew

Name: Ero
Type: Black Opal

Name: Suisei
Type: Rhodonite