Hello Tim. I'm by no means an expert, but I do have a keyboard in front of me, so I'll chime in.
At first glance I can't tell if they are ceramic or not. If you told me they're not ceramic, I'd say they look like flip chips, which are infamously well-regarded as worthless. You say they have pins. I'll have to take your word for it and assume they are gold plated. If they have legs, they are
not flip chips. Flip chips will be soldered to the circuit board via BGA. I can't gauge the size very well, but if they were green, and about two inches by two inches, I'd guess they came out of modern laptop computers.
To sum it up, I think that any chip that looks like that (and has golden legs), would probably have bonding wires inside, or under the die. If ceramic, they might have to be broken to processed. As for the mlcc's, I'll tell you what I've heard. The older, the better because older one's contain palladium and silver. Some higher-grade boards may still contain pgm's, but most modern electronics use mlcc's made with nickel and perhaps some silver and little to no pgm's. Those with the palladium are said to be
less magnetically attractive, and there by,
more attractive to refiners. Use a week magnet to check, not neodymium.
Hopefully the pro's will let us know if I am inaccurate, or if I've missed anything important/notable.
Happy Holidays yall!
mike