Hey guys, I was wondering how I can come across crystalline ears on a rikki? I want to use them on a themed project, but I never see crystalline ears for sale and I'm not sure how to get them.

Are they ever on the diamond shop, or do I just need to wait for a scroll to show up on the broker? Or is there another way of acquiring them? Never seen a wild with crystalline ears for sale, either.

They are a LG Res trait.
I wouldn't say that they're necessarily hard to find/encounter in the wild if you have the Tracker's Hut. However, more often than not, it ends up being a carried/hidden trait.

They can also be obtained via Blazing Fireworks Rikkies or *Shell Rikkies.
*(See here, under Beach Treasure Seeking.)
I imagine they're in decent-high demand, so catching one for sale on AS is going to be hard.
Your best bet would be to make a thread looking to buy the trait/pet.

I see, thank you! I figured they were in high demand and that's why I couldn't find any, but I wanted to make sure regardless.

Fullofawesomee is selling some on this thread. I'm not sure how much they are though.

Thank you for letting me know, but unfortunately I'm looking for ones that can be extracted! Meaning, I want to take them off one pet and put them on another, which I can't do with ones like those! They have to be wild caught.

Ah, okay. I didn't even know that was a thing lol. Sorry I couldn't help!