When watchmaking startup Plug & Feather says their timepieces are "built from timeless materials," they mean it. The faces are made out of stone, milled down to an unthinkable 1mm. The company reckons they're the first to pull this off, and they're not using run-of-the-mill rocks either: They offer (pictured in order, below) Snowflake Obsidian, Cloud Jasper, Sodalite, Carnelian and Charoite.

"Every watch face has been milled from a different sliver of stone giving it a set of marbling and coloring that is entirely unique to that very piece," the company writes. "No two watches are exactly the same."

What's even more shocking is the price--just $99 per watch, at least for a lucky few, meaning the first 100 backers on Kickstarter. And while those are all gone, the next level up starts at $104, with 95 slots left at the time of writing.

Here's the pitch:

This one's no sure thing, however: At press time the campaign was at $20,000 of a $30,000 goal, with nine days left to pledge.