I bought the Candy Crystal Kisslock 16 and it was the last one left at the store I ordered from. A few days later, I noticed there was a missing crystal but it was on the bottom. My local store had none left and I didn't want to end up having to send it back only to maybe get a worse one. I contact Coach and they assured me I could send it in for repair under warranty within 1 year. 

Then I read from a poster here that their store refused to repair their Crystal items. So, I decided to look for supplies to do my own. 

After I wore the bag for a week, I noticed a chipped crystal and another cracked one, so I replaced them at the same time. 

What you'll need:
- a hotfix rhinestone applicator (or super glue, I used E6000 before)
- rhinestones - hotfix ones can be used with either the hotfix applicator or super glue, but non hotfix stones will only work with super glue. 
- a rhinestone picker (basically a crayon like tool that can stick to the crystal) will help pick up and place the crystals. 

For the rhinestones, I figured that Coach probably got them bulk from a Chinese supplier. Lots of suppliers sell on Alibaba and though I don't shop often on Alibaba, I do on AliExpress. I ordered one batch of crystals from one supplier which was close but not quite sparkly enough and the colours were a little off. Then I decided to look for the rhinestone supplier with the largest number of sales I could find, and found one supplier called VDD. 

Because Coach's rhinestones are very sparkly, I got their "Acme+" top quality line. These are the colours, all in SS6 or 2mm size:
- light rose 040
- light peach 010
- jonquil 004
- chrysolite 018
- light sapphire 028
- violet 034 / tanzanite 035

I replaced the original missing stone, which was a pink one, and it is very close (first 2 pics). Probably undetectable unless you knew I replaced it - the pink is very slightly brighter and the stone sparklier, so it's not a 100% match.   

I replaced the cracked stone, a light peach one, by using the hotfix gun to melt the glue off the cracked stone so I can remove it, and then applying the new one. The difference is undetectable. 

Last pic is of the yellow, green and blue stones I bought with the ones on the bag. The purple stones I ordered (violet) are a bit too blue to match so I think the match is actually tanzanite. I also don't have a match for the clear crystals yet because the clear stones I bought from this vendor is too bright and too white. I plan to order some off white and different "grades" of clear stones from this vendor to see if they match better. 

I believe for the brown crystal, "smoked topaz" would be a match. 

Just wanted to share in case any of you want to take on similar DIY repairs!

DIY: Repairing Candy Crystal items