Lithops discoloration?

[Erin9712]

Hello! I've been growing lithops for a few months now and I feel like I've finally got the hang of it. (At least for right now). So I went last night to Lowe's and I picked up a few pots of Lithops and I noticed 3 of the 10 I found are discolored. It's almost tie-dye like. There's almost no scarring and they seem fine otherwise. I was thinking that maybe they were sunburned but from what I have gathered, sunburns on Lithops look different, more like scarring. But I don't know. Im not an expert lol. Anybody know what's going on with these guys?