You can customize your necklace with the charm and colored chain of your choice, just message me to let me know, or contact me at monostash at gmail.com.
These are the default chains that come with the cutie mark charms:
Applejack- Orange Chain
Fluttershy- Light Pink Chain
Rarity- Dark Purple Chain
Twilight Sparkle- Dark Blue Chain
Rainbow Dash- White Chain
Pinkie Pie- Medium Pink Chain
Big Macintosh- Orange Chain
Princess Luna- Dark Blue Chain
Princess Celestia- Gold Chain
DJ Pon-3/Vinyl Scratch- Teal Chain
Octavia- Silver Chain
Derpy Hooves- Silver Chain
Shadowbolts- Black Chain
Wonderbolts- Teal Chain
Spitfire- Orange Chain
Princess Cadence- Dark Purple Chain
Shining Armor- Blue Chain
Cutie Mark Crusaders- Red Chain
The Great and Powerful Trixie- Light Blue Chain
Fausticorn (the ponification of the wonderful Lauren Faust)- Red Chain
Lyra- Malachite Green Chain
Bon Bon- Dark Blue Chain
Discord- Red Chain
Dr. Hooves- Bronze Chain
Zap Apple- Red Chain
Cheerilee- Medium Pink Chain
Queen Chrysalis- Malachite Green Chain
Nurse Redheart- White Chain
Sunset Shimmer- Red Chain