So this is interesting: I'm an EE, so I look at stuff like this all the time. I have a surprisingly decent chance of being able to identify random ICs I've never before (from major Western manufacturers) by pattern alone.<p>These almost all look deeply wrong or counterfeit to me, which is kind of unnerving to look at! I think it's mostly the fonts. There's not a lot of Arial or Bitstream Vera Sans (& descendants) on IC packages.
I don't need these (we already have coasters we like), but they're really cool.<p>The AD7746 has had enough of an influence on my life that, well, a big one as a coaster/paperweight would be a perpetual source of smiles.
Slate slab coasters from Amazon work really well for this. Engraved a couple of these for myself, like a Taito Bubbble Bobble chip and the MOS 6502 for a friend. They make amazing gifts.