What is the most delicious looking rock?

You ever just see a really pretty rock and just wanna take a bite out of it like an apple? Which rock/mineral does that the most?

Here are some examples I can think of, I don't care if it's refined crystals or raw chunks of stone and dirt just so long as it looks delectable

Nambulite

Sepiolite (meerschaum)

Barite

Rainbow Obsidian