I am probably coming back to this later but I put together a metallic pear, a dull apple, and a transparent mug. For the Shader Graph I made two iridescent effects. One that is more colorful for the capsule and another that is more metallic for a banana. I had them rotate to show off the effect better. I hope it looks good.

I made a transparent coffee mug, color changing banana, Metallic Pear, Dull Apple, and a Iridescent Capsule.